Actually, you can easily link a credit card with your Cash app account. But, before it, you will have to add a bank account and debit card to your account. Once, you add a credit card to your Cash app account, then you can make any payment with it as well as add money into your wallet. And for further access Cash.app/help. https://www.email-contactsupport.com/cash-app-customer-service-number/