Poor Customer Service - Mercedes Benz Sandton - Service Department

I booked my car for a service at the Sandton Branch. I was later informed that my vehicle needed to be kept over so that they can order the correct parts and complete the job. I requested for a courtesy vehicle, which I was informed it take 48 hours to be approved by their Head Office. I have spoken Koos the service manager to advise the dealer principle to call me regarding my service on the vehicle. in addtion, I contacted the Mercedes Benz head office and informed them that I am not getting any feedback as to when my vehicle will be ready for collection. To-date I have not received any feedback from the dealership. Previous service there was also an issue the tyre puncture lubricant that was missing from my vehicle, I took it up with the dealership and nothing was done about it. It appears that the Sandton dealership was taken over by the Motus group. There is no feedback from the dealership. Service Manager did not return my calls nor did the dealer principle contact me.