1. According to the relevant laws of our country, if the training institution does not refund the relevant fees, it is generally a civil dispute, and it is useless to call the police. It should be solved by filing a civil lawsuit. If fraud is involved, you can call the police.

2. If the refund is refused, the consumer has the right to bring a lawsuit to the local court to demand compensation for the losses caused by the other party's breach of contract.

3. Receive relevant evidence, documentary evidence, physical evidence, verbal evidence and other relevant evidence according to law.

Suggestions for action:

If you don't return to the training class, you can complain to the Consumers Association. In fact, there are many problems in training courses, such as unclear contract and treaty, and even no contract invoice, which has great potential risks. So it is very important to choose a qualified training school.