Here’s a list of MasterCard’s toll-free phone numbers in various countries: https://www.mastercard.fi/content/dam/public/mastercardcom/na/global-site/documents/global-services-phone-numbers.pdf

And here’s the same for Visa: https://www.visa.fi/content/dam/VCOM/download/personal/security/gcas_general_numbers.pdf

And the content of that file, in case that they might remove that link:

Mastercard Global Service™

Local Toll-Free Telephone Numbers

• American Samoa 1-1-800-307-7309
• Japan 00531-11-3886
• Anguilla 1-800-307-7309
• Korea, Republic of 0079-811-887-0823
• Antigua and Barbuda 1-800-307-7309
• Liechtenstein 0800-89-7092
• Argentina 0800-555-0507
• Luxembourg 800-2-4533
• Australia 1800-120-113
• Malaysia 1-800-804594
• Austria 0800-07-06-138
• Mexico 001-800-307-7309
• Bahamas 1-800-307-7309
• Monaco 0-800-90-1387
• Bahrain 8000-0087
• Montserrat 1-800-307-7309
• Barbados 1-800-307-7309
• Netherlands 0800-022-5821
• Belgium 0800-1-5096
• New Zealand 800-441-671
• Bermuda 1-800-307-7309
• Norway 800-12697
• Bolivia 800-10-0172
• Panama 001-800-307-7309
• Bonaire 001-800-307-7309
• Peru 0800-77-476
• Brazil 0800-891-3294
• Philippines 1-800-1-111-0061
• Cambodia 800-881-001 then 877-288-3891*
• Poland 0-0800-111-1211
• Canada 1-800-307-7309
• Portugal 800-8-11-272
• Cayman Islands 1-800-307-7309
• Puerto Rico 1-800-307-7309
• Chile 1230-020-2012
• The Russia 8-800-555-02-69
• China 10-800-110-7309**
• Saba 1-800-307-7309
• China 2 10-800-711-7309***
• St. Eustatius 1-800-307-7309
• Colombia 01-800-912-1303
• St. Maarten 1-800-307-7309
• Costa Rica 0-800-011-0184
• St. Kitts-Nevis 1-800-307-7309
• Curacao 001-800-307-7309
• Saipan (N. Marianas) 1-800-307-7309
• Cyprus 080-90569
• San Marino 800-870-866
• Czech Republic 800-142-494
• Saudi Arabia 800-844-9457
• Denmark 8001-6098
• Singapore 800-1100-113
• Dominica 1-800-307-7309
• South Africa 0800-990418
• Dominican Republic 1-800-307-7309
• Spain 900-822-756
• Finland 08001-156234
• Sweden 020-791-324
• France 0-800-90-1387
• Switzerland 0800-897-092
• Germany 0800-071-3542
• Taiwan 00801-10-3400
• Greece 00-800-11-887-0303
• Thailand 001-800-11-887-0663
• Grenada 1-800-307-7309
• Trinidad and Tobago 1-800-307-7309
• Guam 1-800-307-7309
• Turkey 00-800-13-887-0903
• Guatemala 1-800-999-1480
• Turks and Caicos 01-800-307-7309
• Hong Kong 800-966677
• United Arab Emirates 800-0444-3895
• Hungary 06800-12517
• United Kingdom 0800-96-4767
• India 000-800-100-1087
• United States 1-800-307-7309
• Indonesia 001803-1-887-0623
• Vatican City State 800-870-866
• Ireland 1-800-55-7378
• Venezuela 0800-1-002902
• Israel 180-941-8873
• Vietnam 120-11576
• Italy 800-870-866
• Virgin Islands, 1-800-307-7309
• Jamaica 0800-307-7309
• Virgin Islands, U.S. 1-800-307-7309

Last Updated 31 January 2019

The contents of the file for Visa’s phone numbers:

Δ Await second dial tone

• Anguilla 1-800-847-2911

• Antigua 1-800-847-2911

• Argentina 0800-666-0171

• Aruba 800-1518

• Australia 1-800-125-440

• Austria 0 800-200-288Δ800-892-8134

• Bahamas 1-800-847-2911

• Bahrain 800-006

• Barbados 1-800-847-2911

• Belgium 0800-1-8397

• Belize 811 or 555Δ800-847-2911

• Bermuda 1-800-847-2911

• Bolivia 800-10-0188

• Bonaire* 001-800-847-2911

• Brazil 0800-891-3680

• British Virgin Islands 1-800-847-2911

• Bulgaria 00-800-0010Δ888-557-4446

• Cambodia 1-800-881-001Δ888-710-7783

• Canada 1-800-847-2911

• Cayman Islands 1-800-847-2911

• Chile 1230-020-2136

• Mainland China (South) 10-800-110-2911

• Mainland China (North) 10-800-711-2911

• Colombia 01-800-912-5713

• Costa Rica 0-800-011-0030

• Croatia 0-800-220-111Δ866-654-0125

• Curacao* 001-800-847-2911

• Czech Republic 800-142-121

• Denmark 80-010277

• Dominica 1-800-847-2911

• Dominican Republic 1-800-847-2911

• Ecuador 1-999-119 or 1-800-225-528Δ800-847-2911

• Egypt (Cairo only) 2510-0200Δ866-654-0128

• Egypt (outside Cairo) 02-2510-0200Δ866-654-0128

• El Salvador 800-6921

• Estonia 800-12001Δ800-406-9982

• Finland 0800-11-0057

• France 0800-90-1179

• Germany 0800-000-6510

• Gibraltar 8800-877-3745966

• Greece 00-800-11-638-0304

• Grenada 1-800-847-2911

• Guam 1-800-847-2911

• Guatemala 1-800-999-0115

• Guyana 159Δ1-855-477-1390

• Honduras 800-0123Δ800-847-2911

• Hong Kong 800-96-7025

• Hungary 06-800-17682

• India 000-800-100-1219

• Indonesia 001-803-1-933-6294

• Ireland, Republic of 1-800-55-8002

• Israel 1-80-941-1605

• Italy 800-819-014

• Jamaica 0-800-847-2911

• Japan 00531-11-1555

• Jordan 1-880-0000Δ888-557-4442

• Kazakhstan 8 800-121-4321Δ888-557-4447

• Kenya 866-654-0162

• Latvia 8000-02288

• Lebanon 01-426-801Δ866-654-0130

• Liechtenstein 0800-89-4732

• Luxembourg 0800-2012

• Macedonia 0800-94288Δ888-557-4458

• Malaysia 1800-80-0159

• Mauritius 01-120Δ866-654-0165

• Mexico 001-800-847-2911

• Monaco 0800-90-1179

• Montserrat 1-800-847-2911

• Morocco 002-11-0011Δ866-654-0163

• Netherlands 0800-022-3110

• Nevis 1-800-847-2911

• New Zealand 0800-44-3019

• Norway 800-12052

• Panama 001-800-111-0016

• Paraguay 008-11-800Δ800-599-1137

• Perú 001-800-890-0623

• Philippines 1-800-1-111-9015

• Poland 0-0-800-111-1569

• Portugal 800-8-11-824

• Puerto Rico 1-800-847-2911

• Romania 0 808-03-4288Δ888-557-4416

• Saba* 1-800-847-2911

• Saint Eustatius* 1-800-847-2911

• Saint Kitts 1-800-847-2911

• Saint Lucia 800-238-5517

• Saint Maarten* 1-800-847-2911

• San Marino 800-819-014

• Saudi Arabia 1-800-10Δ866-654-0129

• Senegal 800-103-072Δ888-557-4451

• Singapore 800-110-0344

• Slovakia 0 800-000-101Δ800-406-9970

• South Africa 0800-990-475

• South Korea 00798-11-00-908-12

• Spain 900-99-1124

• Sweden 020 160 4293

• Switzerland 0800-89-4732

• Taiwan 00801-10-3008

• Thailand 001-800-11-535-0660

• Trinidad and Tobago 1-800-847-2911

• Turkey 00-800-13-535-0900

• Turks and Caicos 0-1-800-847-2911

• Ukraine 800-502-886Δ888-557-4445

• United Arab Emirates 8000-021Δ866-654-0112

• United Kingdom 0800-89-1725

• United States 1-800-847-2911

• Uruguay 00-0411-940-7915

• U.S. Virgin Islands 1-800-847-2911

• Venezuela 0800-1-002167

• Vietnam 1 201-0288Δ888-710-7781

• Updated 1/10/2023