Friend,

Refrain yourself from doing any such act since looking at your post I can definitely say that your manager will make the consequences too bad for you & your guarantor as well.
If you abscond from your current employer you will get a ban to work with other employers in Qatar for a minimum of 2 years.
I would suggest instead BE A MAN & talk directly to your employer about your intentions to resign. Be smart & provide reasons like family issues due to which you cannot manage to stay away from home. Don’t say you are dissatisfied with the job.
Look at your employment contract about resignation clauses & remember there are laws in Qatar which will help you to tackle your manager.