If there is something wrong with the gym, you can ask for a refund, suggest negotiation, if negotiation fails, collect evidence and sue for rights protection. Litigation needs to go to the court where the defendant has his domicile or habitual residence for more than one year. A civil lawsuit brought against a legal person or other organization shall be under the jurisdiction of the people's court where the defendant is domiciled. Limitation of action: the limitation of action for the general obligee to apply to the people's court for protection of civil rights is two years, unless otherwise stipulated by law.

Legal objectivity:

Article 39 of the Law on the Protection of Consumer Rights and Interests stipulates that disputes over consumer rights and interests between consumers and business operators can be resolved through the following channels: (1) through consultation with business operators; (2) Requesting consumers' associations or other mediation organizations established according to law to mediate; (three) to complain to the relevant administrative departments; (four) according to the arbitration agreement reached with the operator, submit it to an arbitration institution for arbitration; (5) bring a lawsuit to the people's court.