Legal analysis: 1. Negotiate a refund with this institution, and both parties will make concessions to reduce the consumption of time and money costs caused by litigation.

2. If no agreement can be reached, you can bring a lawsuit to the court, show the losses caused by the agency's breach of contract, request the court to decide the agency to refund the fee, and you can ask for part of the liquidated damages.

Clauses such as "no refund after the course starts" and "no refund after the contract is signed" belong to overlord clauses and should be invalid.

Legal basis: Article 39 of the Law of People's Republic of China (PRC) on the Protection of Consumer Rights and Interests. Disputes between consumers and business operators on consumers' rights and interests can be resolved through the following channels:

(a) negotiated settlement with the operator;

(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.