Taking clients for granted

Buy a car from them and you will regret the rest of your life. These guys will sweeten the deal and promise everything. 2 and a Half months down the line my car started giving me problems and losing power. I took it back to them, they took it to they people who fixes cars with faulty engines. it’s been a month and they still not paying the third party company which they took the car to. Now they say I must pay the car due to negligence. Trying to pin everything on me yet the car had last been serviced 2017, a 2015 model for that matter. First time buyers do not buy from this dealer or you will regret