There may be several reasons why you are seeing an error message when trying to purchase. Please make sure your billing information (name, address, country, etc) is entered exactly as it appears on your card and/or matches the billing details on record with your bank/card-issuing institution.
If you feel that there may be an issue with your card/payment account and our system, please contact your bank first to review the security features of your account and if your bank limits are sufficient to complete the payment. This will help narrow down whether the issue may lie with the bank in question or the issue is completely within our system.
Please also make sure your account with the game/service provider is in good standing. If this is your first time purchasing with this particular game/service provider, your new account may have limits on what you can purchase. For example, you may only be able to purchase a certain number of bundles/items, or have a cap at a certain price point (i.e., no more than $100 without clearance). You may want to contact the the game/service provider directly at the Support section of their website.
We also have measures in place to prevent abuse or theft of payment information in order to protect the safety and security of your account. If you have reason to believe this may be behind the reason for your payment decline, please submit a Support ticket with us and we will investigate as quickly as we can. We want you to get back to enjoying your game as fast as humanly possible!