If you would like to add an alternative card:-


Tap 3 lines (menu) at the top of 'Home' screen

Tap - Manage Cards

Select + and add card number, Cardholder name, expiry date and CVV

Tap - Save Card


By tapping the card you can set it as your default payment card.


If you have more than two cards you can delete one by pressing "x" and selecting "Delete".  You cannot delete your default card.