If you paid for the car with a debit or credit card, you can also have them fight to get your money back. I did this myself a while back with a different used car dealer, who did nearly the exact same thing with me. Because of how the dealer phrased everything in their attempt to fight my bank, I not only got all of my money back, but I also wound up still owning the truck.

With the DMV involved, you’ll absolutely want a lawyer, though, ASAP.