Renewit Rivonia shocking service

I took my Mercedes to Renewit Rivonia on 05/05/2018 and was promised it would be finished by the 12/05/2018 as I was returning from a trip and required my car ,I eventually got the car back on 16/05/2018 after numerous calls and they don't even have the decency to return your call ,a small scratch on the back bumper was not done and they did something to one of the wheels which was not asked for ,never again at Rivonia the branch in Marlborough is run properly