R22 000 Internet Bill

I received a R22 000 Data Bill from Vodacom more than a year ago, and I have not managed to get it resolved, no matter what I try.<br> I had a Data Contract with a ****le with Vodacom I used for work when out of office, the bill was on average R950 p.m - which was acceptable until a year ago when I received a bill for R22 000 exl. my contract cost.<br> I phoned Vodacom and tried to explain that this must be a mistake as I was office based for the whole month.<br> The lady from Vodacom was not very helpful and the best explanation she could muster is that its data charges so I must have used it, and their system is not faulty.<br> Vodacom then proceeded to block the ****le and my Cell contract no sooner than the next day and claimed I should pay a min of R16 000 before they will switch it back on.<br> I refused to settle the account as I did not receive a real response or proof that I did or did not use R22 000's worth of data, and certainly wont pay for data I did not use.<br> Now I'm being victimised by Law firms claiming they are from Vodacom and after I explained the situation I never hear from them again, only for a new Law firm to call me next month.<br> Any advice?