This situation can be solved by contacting bank customer service, making transactions in installments or increasing the credit limit.

1. Contact bank customer service: You can contact the bank customer service department. The bank customer service may ask for relevant supporting documents to prove the legality of the transaction. Once sufficient evidence is provided and recognized by the bank, the bank may lift the transaction restrictions.

2. Transactions in installments or increase the credit limit: If the transaction amount exceeds the limit of the credit card, you can consider dividing the transaction amount into multiple transactions, or apply to the bank to increase the credit limit.