Terrible service received from Ford Menlyn BB Group

I sent my car to Ford Menlyn on 12 June 2018 for service just before 8am. The car was booked in had to wait for their driver to drop me and other clients at our different work places. We waited until 9am when the driver was finally released to drop us off. The reason for the delay is that they did not want to pour petrol into the car the driver was going to us, and that had to affect us; their clients. The called me later in the day saying my car need a major service which includes a thermostat, fuel flust etc. and would cost R4500, on top of that I need to change wheel bearing and brake drums and that comes to R13000+, also the torque rod and plus other things with a separate quote of R15 000. I then said to them I have a mechanical cover with Bidvest and asked that they engage with Bidvest on what they can cover. I received no response on 13 June 2018 regardless of the number of attempts I tried to contact them. Then on 14 June I asked a colleague to drive me to Ford so that I can follow up. All they had done was the service and I check the hand-written quotation for the service and it was the normal oil and filter change and brake fluid. So I aksed the agent why she told me that the car needs a major service if they did the normal service, and her response was that the two are the same. I then asked why it is costing R4500+ if its the normal service she then said that's the normal price for a service. I had used the hatfiled Ford for the previous service and I had paid around R2000+. Their response was that their prices are different from the Hatfield one. So I told them I want the car back and no longer willing to let them fix all other things they are claiming needs to be fixed and they said they will have to charge me diagnosis fee of R800. I did not ask them to diagnose the car, I asked them to service the car and they are ripping me off on that also.