Please ensure:
●You have entered the correct credit card information (cardholder's name, card type, card number and expiration date).
●You have sufficient money/credit to cover the purchase.
●You are staying on the payment page until you have completed the transaction. Diverting to other Apps/pages may lead to unsuccessful payment.

Should the problem persist, contact your credit card company for further assistance, or consider subscribing with a different credit card / alternative payment method.