1. Check the contract: read the credit card contract you signed carefully to ensure that you understand the terms and conditions. If you find anything hidden or misleading in the contract, you can contact the bank and ask for correction.

2. Consulting legal advice: If you think that the bank's behavior violates relevant laws and regulations, you can consult a lawyer or legal institution to learn about your rights and possible legal remedies.

3. communicate with the bank: try to communicate with the bank and explain the confusion and worries about the contents of the contract. You can ask the bank to provide more detailed information or explanations to better understand the contents of the contract.

4. Record evidence: If you think there is something wrong with the bank's behavior, it is recommended to keep relevant evidence, such as chat records and email exchanges, so as to provide it to relevant institutions or legal persons when necessary.