I am so frustrated

I am so frustrated. Last year I bought a car from Motordealpremium, it's been giving me problems ever since day 1, two months after buying it I told them that I wanted to cancel the contract but they told me that the bank won't agree because it's a minor thing that can be fixed, it kept giving problem after problem and I kept on taking it to the dealership for repairs that where done at non RMI approved workshop s. It finally broke down in January this year and they told me to return it again. I took the car to the dealership on the 17th of January and till today I'm without a car and I'm paying the instalments, insurance, etc. I already took the matter up with The Motor Industry Ombudsman and by the look of things from their reviews, things are not looking good for us consumers. Any advice would be highly appreciated