1. Because there is a contractual relationship between the consumer and the merchant after payment, if the merchant fails to provide relevant services as agreed or refuses to refund, it is a breach of contract, and the consumer can directly bring a lawsuit to the court.

2. Confirm whether there is a "no refund under any circumstances" overlord clause in the contract.

3. Confirm the losses caused to consumers by the breach of the contract by the merchant and the gains that can be obtained from the normal performance of the contract.

Suggestions for action:

Can be carried out according to the following process:

1. Collect evidence of gym default.

2. Confirm the competent court. If there is no special agreement between the parties, a lawsuit shall be brought to the court of the defendant's domicile or the place where the contract is performed.

3. Submit the complaint and relevant evidential materials to the court.

4. Participate in litigation.