Poor Service and Lack of Communication

Im so angry and disgusted by the service at the De Wit Motors garage in Ermalo. I took in my car (Jeep Grand Cherokee) for a 120000km service and I drove all the way from swaziland for this. When I arrived at the garage they told me that they cant accept my car because it was booked in for 140000km service and I told them that this was an error on their part so eventually they agreed to take it. A few hours later they called to tell me that the car was done and the bill was a ridiculous R8000! I was so pissed because from my knowledge they are supposed to call me and keep me updated on the work thats being done on my car and how much it will cost and I am the one who's supposed to give them the go ahead but no one bothered to call me! By that time the banks were closed and I didnt have the money so i had to borrow the money from a friend. This was such an embarrassment and an inconvenience. I don't know if this was a racial issue or they treat all their clients this way but I highly doubt that. Does Jeep SA approve of this behaviour and the way their customers are treated because this is supposedly a certified garage.