Autopage **** service

I am very dissatisfied with the service I have received from Autopage / MTN. End December my daughter told me that her phone was cut. My wife paid in advance so we did not understand, how it could be cut. Then to our utmost shock we discovered the bill to be R 3 000 and subsequently for that December period an additional R2 000 so in total for December a whopping bill of R 5 000. The catch is I pay every month for 'my limit\ which I specified to be R 500. I don't mind it being slightly over if it was not cut immediately but R 4 500 more than I should pay is completely ridiculous. How is it that an person on pay as you go can be cut when they reach there limit. They did give me a 40% discount on the account but that means I still have to pay for 60% of there error."