What will the police do ?

If you explain the situation to the police, I think they would take you somewhere (if you are under 18---to a foster home). If you are over 18, your only solution would be to move out on your own. I do not understand WHY your folks would force you to go to another country in the first place. Can't you talk to them and tell them that you do not want to go? That would be the first step---talking to them. If they will not listen, go to a trusted family member who will help you, or go to the police. Good luck.