Request for assistance on the repairing my gear box

On the 28 January 2021 I got involved in an accident and my car was bumped on the front passenger’s door. On that same day Budget Insurance took the car to Renew-It at Bedfordview for repairs. On the 28 February 2021 I fetched the car. Only to find out there were still faults in the car. However, due to them not having space for keeping the car there I was told to take it home and check for other faults. Then few day later, they (Renew-It) came to fetch the car for further repairs. It was returned on the 03 of March 2021, unfortunately it was not my car which was returned, it was somebody else’s car. The same day we went back to fetch my car. Again, I discovered there were still faults with my car. However, I took it anyways as they complained about space. They said I must keep the car until further notice. They never came until one day as I was trying to utilize the car, it jumped. Due to my helplessness I took it to where I bought it (Haval at Alberton) because the car is still under a warranty. At Haval I was told that the car’s gear box was damaged and that they can not help as the gear box was damaged during the accident. Furthermore, I was told that my insurance should fix the damage. However, my insurance namely, Budget Insurance denied to fix it. Hence, I require your assistance. As I am struggling with transportation during this time of COVID-19 and My car is still at Renew-It in Bedfordview. Haval nor Budget Insurance claim that they are not liable towards repairing the damaged gear box.