First of all, it depends on the specific terms of the contract. If there are overlord clauses, or even clauses that do not conform to the law, the contract is not protected by law.

You can try to communicate with the gym first and ask for a card refund. If negotiation fails, you can choose to complain to the industry and commerce department or call 123 15. You can join other members to complain, or even take legal proceedings together. After consulting a professional lawyer, you can bring a lawsuit against the violation.

You can also consider using the power of the media and public opinion. If you can save face, you can make a big fuss. The gym still needs to do business, and you certainly don't want to spend it with you. The bigger things are, the better for you.

Finally, no matter what the result is, we should learn a lesson, keep our eyes open in the future, and beware of being deceived.