Walmart offers the following phone number for customer service, contact Walmart International.. ..Walmart customer phone number.. Wal-Mart is an American public corporation that runs a chain of large discount department stores and a chain of warehouse stores. WALMART CUSTOMER SERVICE 1-800-Walmart (1-800-925-6278) Financial Services • Walmart credit card: 1-877-294-7880 • Walmart Community/business card: 1-877-294-1086 • […]