I heard several cases as yours, notify the bank (by letter) that you are unble to pay for succeding months until you get a new job. you cannot go anywhere I mean outside the country until you seattle/finish your loan. Im sure that you will be able to get NOC from your sponsor to find a new job because the goverment have no choice to hold you in this country until such time you completed your loan.

Other option is sell your car .... in order to lower than your loan.

Hope you can find a new job sooner.

Good luck to you!