Dissatisfied client. Mccarthy Kunene witbank

Greetings. My Mercedes C63s went for A1 service to Mccarthy Kunene on 19/01/2021. One of my faults was a rattle coming from the dashboard. That afternoon around 16h30 a lady from the service dept called to say that they have to strip the dash and if i had a problem if the car stayed overnight. I was ok with that. She contacted me on the morning of the 20th saying that my motorplan does not cover the cost and the rattle was because of wear and tear. She said it will cost me R4800. I could not understand how a top of the range mercedes with 85000km can have a rattle on the dash and they say me it's wear and tear. This has made me think twice about buying a Mercedes again. Anyway I agreed to pay the R4800. Later that afternoon I was contacted Again around 16h30 to say my car is not ready. I waited the whole of Thursday 22/01/2021 for someone to contact me. NOBODY DID. So thought the driver would deliver my car that afternoon. At 18h00 I called the driver to ask him where is my car and he said its still parked outside and he does not know what's wrong. Hearing this I tried calling the garage but there was no answer. I am totally disgusted with the service received from Mccarthy Kunene Witbank. I have a meeting tomorrow which I must postpone due to this. I am totally dissatisfied and really frustrated. Thank you