Is there any rigth of the employer to give back...

the payment of the salary is the most important priority and obligation by the employer as resulted from the contract. breaching this term or obligation is considered as legal justification for the worker to terminating the contract and getting all dues. Also, may transfer to another employer after the consent of the ministry of interior and the HR. therefore, you must file a complaint at the labor office and prove that you did not get the salary for 2 months, and ask then to terminate the contract in case there is another employment contract
We would like to inform you that regarding to the passport, you can review the migration if the employer submits it to  them and requests to obtain your passport