To change your credit card details:
ϟ Go to the Wallet, in the “Manage card” section
ϟ Delete the existing card
ϟ Add the new card: the short description is an alias/identifier you want to give the card (e.g.: Absa, Fnb,..)
ϟ If you make use of SMS vending, do not forget to update your SMS vending setup in the Electricity / Set up SMS vending section: link your new card to your meter and cellphone.