Fix the *****ulent bill

The service I'm getting from Telkom is appalling to say the least. After being a loyal customer for so many years with multiple devices, one of their employee decided to de***** me. I have an account which debits R1700 monthly but to my surprise this month I was slapped with a R7000+ bill which I don't know where it comes from. I didn't take a new phone or upgrade or even reach any limits. I always top up whenever I run out. I lodged a case and was told to check on the 13th November for an update (amount due to be debited on the 15th), which I did and the consultant promised that she will request the person attending my case for an update and will send an email to inform me of the progress before end of business (this was in the morning). A few minutes before 5pm I called since I got no email and business is closing. Found Olwethu who promised the same thing that she will get the person in charge to contact me. Same story as the first lady. I wanted the name of the person who's supposedly handling my case and she blatantly told me she can't disclose the name. How is it prohibited for me to know the name of this person so that I can request for them directly when I make a phonecall as opposed to hopping from one consultant to another telling me the same story. I even doubt my case is attended to because even the case handler doesn't bother contacting me AND WORST PART IS, ALL MY DEVICES HAVE BEEN BLOCKED. CANT CALL, SEND SMS OR CONNECT TO THE INTERNET. I told the first consultant that they need to suspend this debit until the investigation is done because there is no way I will pay such exorbitant amount for something I did not do but it seemed to be falling on deaf ears. It does not seem like they care. TELKOM FIX THIS!!!!!!