I would report this to the American Embassy and the police.
Good advice.
suzannabanana you were assaulted. Report it.
It does sound like a scam indeed. Good for you that you didn't get out the car, that was a sensible move. I doubt the police are looking for you. More likely they are looking for a gang who are scamming money out of people and you might be able to provide them with a better idea of who they are looking for.