When you encounter this message during the subscription process, it means that your subscription payment transaction did not go through. Your card-issuing bank may have declined the transaction as it may not match your online transaction pattern, exceeds your purchase limit, or there was an incorrect entry of subscriber information, including card number, CCV code, expiration date, name on card, etc.
Please contact the card-issuing bank to resolve the problem and then try the operation again. If you prefer, you can also use a different card or payment means as mentioned above. If the issue persists please email us at firstname.lastname@example.org .