Pay My Wayfair MastercardNot a cardmember? Apply online today CONTACT Wayfair Credit Card 1-800-365-2714 24 hours a day, 7 days a week Additional Phone Numbers Technical Assistance 1-800-685-4608 For TTY: Use 711 or other Relay Service. For the AllModern Mastercard, you will earn Reward Dollars when you use your card outside of Wayfair Sites: 3% at grocery stores; 2% for Qualifying Online Purchases not made at Wayfair Sites; and 1% on all other Net Qualifying Purchases made with your AllModern Mastercard. Wayfair Credit Card. They can assist you with: Paying your bill. Terms, conditions, and fees for accounts, products, programs and services are subject to change.