To fix my car which is still under guarantee.

I have serviced my car during October 2015. Before I took my car in for service I keep on hearing a noise from the dashboard when my car is in reverse. Danie from Constantia McCarthy informed me that the noise caused is due to a clamp on the Air conditioning system and it will take longer to fix it. I have requested them for a loan car for a day in order to take my car to them to be fixed. No response. I took my car on the 21st of December 2015 while I was on leave - not happy - they could not get the parts in time to fix my car. So, since October to December 2015 nothing has been done to order the specific parts!! I have left messages - no response. Up until today Constantia McCarthy did not call me to make another appointment. Thus I demand that they will get me a loan car - or to drop me off at work in Hydepark and to fetch me, as their excuse is that there are not enough loan cars available. They must order my car's parts in time and get my car fixed and done while it is still under guarantee. Certainly they have closed my file and forget me as a client.