You have several options to see how much you have to pay for your credit card:

BT Visual Help:
➭ call 0264 308 000;
➭ access the link you received by SMS and, from the main menu, choose the "Balances, collections, transactions" section;
➭ then choose the credit card account you have and select the "Payment obligations" option.

BT24 Internet Banking:
➭ log in to the platform and go to the "My accounts" menu;
➭ select the "Quick view" option, and then click on the "Details" button for the credit card you find in the "Credit statement" section.