If you have chosen to save your credit/debit card details in the past, you may choose to delete your saved card details the next time you issue a new payment.
To do so, please click the "use a different card" button on the page where it is required to enter your card details. This will allow you to enter new card details manually into the form.
If you are still experiencing issues with this step, please take a screenshot of the payment page and contact us directly.