The credit card limit is insufficient, expired or canceled, etc. If you always fail to bind a credit card on Blizzard International Server, there are some reasons:

1. The credit card limit is insufficient, resulting in the failure to successfully bind. At this time, you can confirm whether the available limit of your credit card is sufficient.

2. The credit card has expired or been cancelled. During the process of binding a credit card to the Blizzard International Server, you need to confirm whether the validity period and card number of the credit card are correct to ensure that the binding can be successful.

3. There is a problem with the payment system of Blizzard International Server. If binding a credit card several times still fails, you should confirm whether the payment system of Blizzard International Server is operating normally.