First of all, you should confirm the facts of labor relations with the company, such as payroll, attendance records, and document records during work.
Secondly, after confirming the labor relationship, the unit should notify the laborer one month in advance to terminate the labor contract, otherwise it should pay one month's economic compensation as a substitute payment.
Third, if a unit terminates a labor contract in violation of the law, it may demand economic compensation, and the amount of economic compensation is twice that of economic compensation.
Fourth, if negotiation fails, bring relevant information to the labor inspection department to complain, or directly submit it to the labor arbitration committee where the unit is located.
Blessing!