Bad service

My consultant that sold the car to me had so Much story's on the car I received 3 BMWs and not one of the worked after 4 moths now I tried to cancel the deal but they did not want to and to go to th ombits will take to long the money is in the dealers bank and my car is still at the dealer for now a nother 2 days Om one of the cars I received the km was turned back