Charges on data of R25 000

July 2015 two data cards were charged over R25000 for 2 mths. One data card allowed for 5 G and the other device 2 G usage. Numerous visits to the local MTN branch for assistance, calls, emails and a visit to MTN at 14th ave , but to no avail. We were told it's not impossible for 1 person to use the data. I asked MTN to have a look at a history of an average usage of the account of approx. R1800 pm, for both data cards and 2 cell phone lines, and take note that this is a huge increase in data usage for 1 individual. I brought my credit limit of R5000 under MTN's attention. How was the account allowed to increase to this ridiculous amount, which was only brought under my attention once the lines were all suspended? It's unthinkable that 1 person can suddenly be faced with an account of over R25000 after exceeding 7 Gigs allowable usage. An email showed I was on the internet 4623 times in 1 day. Needless to say this is impossible. Furthermore I've asked MTN numerously to contact my legal advisory, BUT to date NO communication was received. This is the worst service I have ever experienced, the matter is absurd. Solution would be to look at history of 18 yrs.