Negligence & Unauthorised debits on going for over 3 months..

Having an absolutely horrifying experience with Telkom, once again. My previous is still on going for over 3 months now.. They do not bother following up with customers and without authorization, they continue to debit my account every 2 weeks, for R20K, for an account I am a not liable for and I was told that by one of their agents that I am not liable. They closed the previous case number without any feedback what so ever. I have to keep running after them every single day... This is just so pathetic. I can only hope that they can finally resolve this issue and remove the account off of my name as soon as possible...This is going to affect my credit and daily I am getting harnessed by their collections department, demanding payment... They will never get any business from me or anyone I know in future..