Bad service and bad workmanship

I've thought Ross champion mount Edgecombe to be the best which is why I brought my car here but unfortunately they are the worst, the staff that works thier is very ***********, my vehicle was in an accident and I spoke to to Desmond the assessor of Ross champion and told him about my right front fender to be repaired as well which was part of the accident so I brought the car in well before I booked it. He had then assured me they will add to additional repairs. I then booked the car in and they kept me updated from time to time and then I enquired about the right fender and Sidney reddy acknowledges it and advises that they still waiting for additionals to get approved, eventually it gets approved and weeks after when the car is ready I'm in to pick up the car, I see the fender is not repaired. At the premises Sidney reddy tells me he only looks at where the damages was approved but the fact he acknowledged it on the whatsapp group chat when I enquired about the right fender when he said his waiting additionals to get approved, he then goes and tells me that his now going to ask the insurance that the customer wants to now repair his fender which is absolutely nonsense (wants to cover his tracks for his negligence) I have told him that he needs to step up and take the accountability and tell the insurance that I told him about it way in advance and it was his mistake that he didn't add it. Eventually I had to sort it out with the insurance myself then it got approved. My question to Ross champion what's the use of having assessors like Desmond if they can't get the job done? And what's the use of having whatsapp group chats when guys like Sidney acknowledges what customers say but doesn't do what's required? Further to that once the car was finally done, a few weeks later upon washing my car I found that water was leaking inside my car from the back glass I took it back to Ross champion and they sorted it and the guy he tested for leaks and assured me that it's sorted when I picked the car, upon washing my car again weekend I see the leak again in the same place. How can a simple thing like that not be sorted out properly the 1st time I now have a vehicle which is not repaired fully because of Ross champions *********** staff and this is inconvenient.