Business ProfileforMcGovern GMC

I purchased a vehicle from this dealer at the end of August, right away I began having issues and after going back and forth with the dealer and telling them I will file a BBB complaint they finally agreed to repair the vehicle at no cost to me. I received the car back end of November and was told all issues with the vehicle including the replacement of the motor, the same day I received the car back I noticed it still was not driving correctly so I called the dealer back and they picked up the car and now saying the vehicle now needs a transmission replacement. The dealer is going to do a vehicle buyback, I paid 3 months of payments to ********* bank on this car in the amount of $380 each and never had the vehicle in my possession. The dealer did provide a loaner car while they were fixing my 2017 Lincoln MKZ for approx $23,000 but I feel in good faith the dealer should owe me back my 3 payments I made on the vehicle that I will now not have any longer. I was sold a 2017 Lincoln MKZ by this dealer that had multiple issues with it and needed two major repairs, the engine and now the transmission along with a few other things. The dealer provided me with an SUV loaner and at one point also loaned me a pickup truck which I felt uncomfortable driving and is costing me more money in gas than if I had the sedan I purchased from them, the dealer is refusing to pay me the 3 month payments I made and I would like some help on how to move forward and seek the money from there.