I want to release from my previous company but...

A worker whose work contract has ended has the right to obtain from the employer a certificate of termination of service that includes a statement of his period of service, work and the last wages he received and if the employer refuses to give the worker this certificate, the worker has the right to file a complaint against the employer at the Labor Office to oblige him to issue this certificate by the provisions of the Labor Law as follows:
Article (53)
The worker who terminates his work contract shall be entitled to an end of service certificate from the employer stating the duration of his services, his position and the last remuneration he received. The employer shall not have the right to include, explicitly or implicitly, any expressions that may harm the employee or limit his employment prospects. The employer shall return to the worker all the documents, certificates or tools delivered to him by the employee.