Sold damaged car

I bought a car from Imperial Select The Glen in july 2017. Ever since, I have been having one problem after another with the chery qq3 I bought from them. It was in an accident, the sales lady did not info me about that. Now there is something wrong with the engine and they not willing to assist me because now they say they don't deal with chery cars. I am paying the bank for a car that is not in good condition. I regret ever doing business with Imperial Select The Glen. Never again, now the car is parked in my yard. Im back to using taxis but I am paying for a car. How does that even work? Paying for something that is damaged. She took advantage of me because im young and clueless about cars. Lesson learnt, never go and purchase a car on your own. Go with someone who has a clue about cars.