To update expiry/CVV on existing card
Click on the Admin Console (gear icon in the top-right of the screen).
Select "Billing Management" in the left-hand side menu.
Under the "Payment method" section, click the "Edit" button.
Make the changes as needed to the card.
Click "Save" in the top-right corner to confirm the changes.
To change to a new credit card
Click on the Admin Console (gear icon in the top-right of the screen).
Select "Billing Management" in the left-hand side menu.
Under the "Payment method" section, click the "Remove" button.
Once the old card is removed, return to the "Payment method" section and click the "Add" button.
Add details on the new card.
Click "Save" in the top-right corner to confirm the changes.