<prompt> Human: I purchased a new Nissan Sentra from a dealership three months ago. When I brought my car in for an oil change, the dealership stated that the car is registered as being owned by Nissan. I brought in my paperwork which all has different vin numbers and even a different car color.Now the dealership is demanding that I give them the car we actually agreed on and take this older beat up car for the same price as the new one! On top of that, I traded in a Jeep to pay for the car which the dealership has already sold.I keep trying to be firm and tell them Im not signing anything, but the dealership is claiming that I have to sign this new contract for a shittier car. Where do I go from here?EDIT: I told the dealership I wasnt signing anything and left with the car that we had actually agreed, not the one they gave me paperwork on. Now theyve sent me a document in mail to sign stating that I had originally agreed on the older car. Obviously Im not going to sign it, but Im just getting sick of all this hassle.  <response>: I would definitely consult a lawyer ASAP. There are several possible explainations for what happened, none of which were your fault and all of which were the dealerships. Depending on which it was, decides on how severe an issue it is.1 Given you didnt test drive this other vehicle AT ALL, plus they gave you the keys and you were driving the one you planned to purchase around for 3 months, tends to suggest someone there screwed up the paperwork. Their problem, they should fix it. 2 Bait switch. They let you test drive one car, then did the paperwork for another in a pure bait switch. You drive off with the wrong car and months later they come after you with their paperwork. Also, given the fact they already sold the Jeep you traded in, if theyre claiming they made an error in the original negotiations, then that trade in is void. They owe you the Jeep back. Oh, they sold it? Youll take the cash value they sold it for OR the Blue Book Value, whichever is greater. No, you dont want the value of the trade you have NO VEHICLE as they SOLD it, you want the money THEY sold it for or the Blue Book Value - whichever is higher. Lawyer up immediately and let the lawyer chew them a new one. The fact they let you drive it around for 3 months before noticing their paperwork was in error shows they thought themselves you had the right car at the time. Either theyre hoping youll roll over and they can make some extra cash or theyre trying to pull a scam. 