data mistakes

today mtn temporarily suspended my services due to my account being too high already for the month (over the limit on the account), even though i have been a contract client for over 10 years. the reason being because i have used R3,500 of data already for the month... which is physically impossible. when i called in to query this and get the line reactivated (which they did), i explained that there had to be a problem - to which i was told that i would have to wait and see what happens on the 2nd September with the bill. so on the 2nd of September when i receive an additional R2000 for data that i am NOT using, MTN will just tell me to pay the bill or they will turn off the line??? they couldn't answer that. what is worst of all is that they are not held accountable for this kind of thing, the attitude is just pay or deal with the consequences... where are the consequences for them making mistakes and charging incorrectly? its not fair and i think we unconstitutional! and this is happening to people i know all over South Africa (on Vodacom too BTW). i specifically asked for the supervisor to call me as he was unavailable (Boitumelo Maisa), but have heard nothing so far. not cool!