I feel that I was scammed by Motor City PMB

Hello I bought a car at motorcity in PMB and after two weeks the car started showing problems and only to notice that some of the cars parts are not the original parts of the car and It seems like the car has been once involved in an accident.The drivers door could hardly be closed, the windows on the car have different codes and the drivers side were dimed windows with smash and grab and the others clear windows with no smash and grab.The drivers door inside had the door pilling off.I was told the car was brand new only to find out the car had 2000km and its a demo that wa sold to me at a very high price than the normal car retail value. Now after this two weeks trying to return the car and now they are telling mr stories and they have not given me the spare keys,delaying to send me the contract.