Call the bank’s credit card service hotline and follow the prompts to enter the manual service to inquire about the reason. Or go to the bank and ask what the situation is, and the bank will provide a solution. If the credit limit is reduced due to insufficient credit or late repayment, you can usually resume use if you pay off the balance in a timely manner.

The most common reasons for credit card non-acceptance: 1. The amount paid exceeds the limit set by yourself or the maximum overdraft limit stipulated by the bank. In this case, you only need to reduce the payment limit or reset the limit. That’s it. 2. The available credit limit is insufficient. In this case, the only option is to change the bank card for payment, or reduce the credit limit. 3. The credit card is frozen. This is the most complicated situation. You must first consult the bank to find out why your credit card has been frozen, and then solve the problem before you can apply for unfreezing. You can use it after it is unfrozen.

It is recommended that everyone strictly abide by the bank's usage regulations when using credit cards.