Vw bethlehem *****s me

I bought a vehicle at vw bethlehem 5yrs ago,I recently found out that my vehicle is a used car,whereas my vehicle contract state that I bought a new car,and I have never signed for anything used,now they dont want to take any responsibility,they are taking me to pillar to post,I have been paying an installment of a new car on a used car,I will never advice anybody to buy a vehicle on this dealership,they are not honest at all,if your planning to buy a car better visit other dealership,vw bethlehem it's a no go area.