Unacceptable

A few months ago I was rear ended while being stationary at a traffic light. Damage was done to the body and tailgate of my car. I contacted Oakhurst, I have been told to take my car to cmc auto panel in Brackenfell. They then repaired my car, which I was not happy with. The tailgate still had a kink. They told me that Oakhurst was informed that my car needs a new tailgate, Oakhurst then said that Cmc should try and fix the tailgate as best they could. I then emailed oakhurst telling them I am not happy with the car's repairs, I only received a sms saying the complaint has been lodged. No one contacted me at all. Cmc called me, telling me to bring the car back, which I did. Today cmc called me, told me my car is fixed and I need to pay an excess. This is the first I heard of it. How can I be liable for extra costs if the car was not fixed properly in the first place, was I supposed to just accept my car as is? I received communication from Oakhurst. What is the point paying for insurance every month then??? If I am not happy with the service. I will be CANCELLING my contract with Oakhurst so will my GF. This is unacceptable. I pay roughly R1100 p/m for this service? I am DONE