Substandard service

Booked my Mercedes in to Mercedes Benz Claremont for a service and repairs on the 5th of October 2015. Booking was for general service and maintenance work to Indicator lights and front seat belt (not working). Seat belt part was ordered and repair was to be concluded with the service. Received my vehicle back that afternoon - Seat Belt was not repaired, indicators were not working and the vehicle had not been washed. Informed Mercedes and was requested to bring vehicle in again. Delivered the vehicle and once again the seat belt had still not been repaired. Indicators worked for 3 days and stopped working again. Once again my vehicle was not washed. In addition to the poor service received reception area was tacky, there was insufficient seating for clients (had to stand for 15 minutes whilst waiting) and staff had a nonchalant attitude about the clients. This is the first time that I have had the misfortune of using this particular branch - level of service is definitely not what I am used to from Mercedes. I had previously serviced my vehicle through Mercedes Benz in Menlyn - facilities were brilliant, clients were treated like gold and work was completed on time.