Time frame for the execution of a labor-case final judgment

I filed a case against my employer for my salary in court. My amount is 20,000.

How much time the execution court takes after the final judgement?

What would I do after the final judgement?

They didn't appear in any hearing and they cancelled me before submitting the case. Now I am overstayed in UAE.

What is the procedure to remove the fine?

Thanks!