NO service NO feedback

My vehicle went to Chery Boksburg for a service on 12 March 2015. When I made the booking I told the service adviser (Bongi) that there is a knocking sound in my dash on the left hand side. They were going to have a look at what the problem was but then never did as for some or other reason they did not have enough time. I was there that morning and if they started working on time they would have finished the job but no. This meant that I needed to make another appointment to take back my vehicle (what a schlep). Then when I asked what it is going to cost they could not give me a price, I them asked for an estimate but still nothing. After calling numerous times from Monday 16 March 2015 I then only on Friday 20 March spoke to (branch manager) Dewet who advised that he will come back to me on Monday 23 March 2015 and still nothing I then called him but he was not available I asked for (Parts Manager) Divan and he was also unavailable? I phoned them this morning 25 March 2015 and could still not talk to anyone?