You can handle the issue in two ways. First, you can report the matter to National Human Rights Committee and they will help you out. You may be advised by them to take the matter to the Labour Office. If you file a complaint against the company at the Labour Office, they will help you get your money and settlements. However, your company may retaliate by sending you home on an exit over your action.
A second way is to just continue to bear the situation silently if possible the way you are doing now and allow your service to complete 5 years after which you can just go for another job and transfer your sponsorship.