Buy a new car and pay full price but get a demo

I sent an email regarding my query to your customer care on the 12/03/2015 and still haven't got any feedback at all. I was sold a new vehicle and paid full price, how ever i have not reserved a new vehicle at all but a demo. the dealership doesn't want to assist me and it seems to me as if Suzuki SA also doesn't want to help.<br> <br> Gerhard Crous