Car booked in but turned away later

As usual I called Mercedes Benz Menlyn to book my car for service and the consultant made and confirmed booking, the following day 8/03/16 I took the car in and Sifiso the service advisor received it. <br> Talking about mileage he checked and confirmed that it was the<br> Last service under motor plan and he mentioned that he will speak to them as it was a little bit over 100000 mark, as usual I was not worried because my car has been serviced there all the time without a problem with mileage over 1000, eg 1st service it was at 21215 instead of 20000, 2nd at 41503, 3rd 61177, 4th 82186, this was never a problem at all and I was never charged a cent for it<br> Why today is my car turned away for being over by just 776 km?<br> The worst part, I requested my car to be ready by 1 as I had an interview at 2 and I was promised it will be done, only when I called to remind the pick up driver to come at -, and to confirm if my car was ready, Sifiso told me then that my car didn't go in, because it went over the 100000 mark, <br> Only then I' was given an option of minor service which I will pay around 3000 or a service it was due for which will cost around 11000,<br> Why mileage an issue now? Why disrespect