You can read the rest of the blog to learn how to add money to your Cash App card. Would you like to know how to add money to your Cash App credit card? Although you can add a cash-app debit card as well as a cash-app credit card.It is essential to contact the Cash App support on the Cash App phone number. Not only does one need to contact Cash App support if the Cash App payment is pending or fails, but one can also request an Cash App refund. There are two ways to contact Cash App customer service.