Exorbitant bill of R30 000

I have attempted to lodge a complaint about an exorbitant bill which totals to approx R30 000. Last month I was billed R9000. I went into the branch & they suggested I call the call centre. When I did this they asked me to e mail my complaint. To date I have: <br> 1. Not Heard my Tele conversation (was told this would take 24hours. A day later when I called back I was told to call at 4. Still have not heard it. <br> 2. They have closed my request with absolutely no feed back or resolve. When I called today at 4 to complain that it has been closed they have reopened it. <br> 3. Unable to help me as to how come I have got such an exorbitant bill. I requested an immediate report (as my next payment is due on 30th) to see what sites & times I incurred these costs,I have been told that it will take 3-4 weeks to get information on where this data has been used as it is a vodacom package, but even if line is hacked I am liable for costs. <br> 3. Why,as a consumer, was my line not cut at R 4000-00 for excessive use or at least why was I not contacted to get my approval if I am willing to exceed this limit. My bill is normally btw R500- R1000 & have had it for + 5yrs. I feel frustrated and vulnerable.