Under normal circumstances, if you want to refund the training fee after the contract is established, there are several ways to protect your rights: First, settle it through consultation. If negotiation fails, you can report to the Consumers Association or the industrial and commercial department. If it still can't be solved, you can file a civil lawsuit. You can also file a civil lawsuit directly without consultation.
Regarding the complicated legal dispute of training refund, it is recommended to consult a professional lawyer.