Car under warantee

From the day I drove my car off the dealership floor, I noticed a knocking sound on the left-hand wheel. Concerned, I reported this to Nissan Parow and returned the car, only to be told there was nothing wrong. Still uneasy, I took the car to Nissan Milnerton. They attempted repairs but broke my camera in the process, which they later replaced. Unfortunately, the knocking sound persisted and has now worsened, causing severe tyre wear. Recently, Nissan Milnerton identified the root cause and confirmed it should be covered under warranty. Initially, I was told the repair was approved, pending mechanic confirmation. Later, I was informed the claim now needs to be submitted to Nissan South Africa due to the cost involved. I was later told Nissan SA had declined the claim, However Nissan SA then said they never declined it. So i'm being accused of dishonesty as well. The tyres are now unsafe, posing a serious safety risk and potential fines. This entire process has caused significant inconvenience, additional costs, and stress. To make matters worse, a scheduled meeting on Friday at 10:00 did not take place, forcing me to reschedule an important Exco meeting. I was later contacted during another meeting despite confirming availability earlier. I have acted in good faith throughout this process, yet I am being accused of dishonesty and subjected to unnecessary delays