You can delete a credit or debit card that you no longer wish to use as your payment method directly in your account.
How to delete a card?
Log into your GetResponse account and go to Profile > Billing. Hover over the Menu (vertical dots) next to the card you want to remove
Click Delete to remove the selected card.
Note: There needs to be at least one payment method linked to your account at all times, therefore you will be able to see the Delete option only when you have at least two cards linked to your account.