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 ****ed 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.