1. Contact the bank: First, you can contact the issuing bank and ask about the freezing reason and unfreezing method. If the freeze is caused by false information or bad credit, relevant certification materials need to be provided to unfreeze it.

2. Retain evidence: Keep relevant evidence, including the information provided by the other party when handling the card, the card handling contract, payment records, etc. , can help prove their rights and interests and avoid subsequent disputes.