Barons Bellville sucks

I took my VW T5 Kombi to Barons Bellville to book it for aircon repair. The aircon was perfectly working in the front, but was not working in the middle and back seats. It was blowing hot air. I dropped the car early morning before I went to work. During the course of the day I received a call to say there was nothing wrong with the aircon. I was however told that there is R1200 for diagnosis. I explained that it works in front and does not work at the back and middle rows which is the reason it took it there. This tells me that they never checked what was wrong with the vehicle. How come did they check in front only while they could see it is a van with seats in middle and the back. The lady on the phone said I did not mention that when booking in the vehicle. It is exactly what I said when I went there with the vehicle to book it in. Anywhere, the car stayed there for the next day for more diagnosis. Next day, I received once again a phone call from the same lady to say that they discovered the problem, that it was my air dispenser that wasn't working. I was given the quote of nine thousand plus. I told the lady to go ahead. Next say, I received another call to say that they have replaced the air dispenser but the aircon does not work because after verifying the year model of my vehicle they found out that the car did not have aircon in the middle and back but the fan only. I did not know that the van did not have aircon at the back that is why I took it there. I would imagine that as a car dealer and workshop of their kind they were supposed to know better which year model has or has not aircon. Basically, the air dispenser was replaced unnecessarily and I was made to pay more than 9 grand for something that was not supposed to be replaced for the first place.