If you are unable to use your credit/debit card to complete the checkout, it could be due to transaction restrictions, card errors, an unacceptable card type, or restrictions resulting from card abuse.

To understand the reason why your card was declined in the first place, please contact your bank. They should be able to assist you. If the issue cannot be resolved within a short period of time, try using another card (if available) to make the payment again. Alternatively, you can consider changing to another payment method.