From your personal point of view? If you have enough evidence, you can sue the company, employment certificate and salary slip. Punching time rules and regulations, employee handbook, resignation certificate, etc. stamped by the enterprise. If there is no contract and insurance, you can claim for compensation. You have to be prepared to put it off for at least a year. First of all, you have to go to the labor arbitration section for arbitration. Maybe two or three times. Then you can sue within three months after the coordination fails. First instance and second instance. Final review. Failure to appear in court once during the period shall be deemed as a waiver. But if your family is local, you will usually win if you have time.

From a business point of view, you do this everywhere. It is normal to work overtime, but it is unreasonable not to give you a deposit. This should be solved by your superiors.