Kian Table View caused more damage to my Renault Duster

I had a horrible customer experience and I’m still shocked about it. I took my Renault Duster, 4x 4 on Wednesday, 26 September for breaks to be replaced for which I paid cash over R10k. When I fetched my car for I noticed that my rear mirror was broken in half. I spoke to the service manager about it and asked him why I was not informed about the incident. He said to me that he was not able to hold his technicians responsible as there is no cameras inside. However, he would have been able to view cameras if anything had to happen outside of my car. He further told me that he could arrange for me to pay R1500 for the replacement of the rear mirror. I told him that it was not about the money as I was able to pay the R1500, however I did not agree with the ethical behavior surrounding the incident. In that, he was unable to explain what happened to the rear mirror of my car which I trusted him witth. Furthermore, he checked on the their record to see if my car mirror was broken in half when it was taken in,fortunately there was no such a record at all. So, it was proven that my rear mirror was broken in half and/or replaced with a broken one at Kia Table View. Despite all the evidence, all he did was to say sorry to me and not take responsibility for the damage that was caused in my car. I live in Table View about 500 meters from Kia, however, I will never again take my car both service and repairs to them.