Poor client service by Westvaal Mashishing and Renault South Africa

My car (Renault Clio 2001 model) was brought to the garage after it broke down next to the road. It basically took 7 working days to figure out what the actual issue was, which is fine since they deal with quite a lot of clients. For 2 weeks they could not get the correct parts (Timing belt and Pulley's) due to disruption in parts of South Africa. The next to weeks came and I was told that the parts are on their way but the arrival day is not known. Eventually 5 days later the parts arrived BUT there was a part missing, and I am still waiting for feedback on when I will get my car back. Called this morning and again they said "I will get back to you"