Telkom *****ing my money!

We have a business line which has "attracted" an additional fee of approximately R2000 in August last year, for who knows what. Since the telkom shops can't help me, and the telkom account ladies just drop the calls on me, without explaining what this charge is for - which I most definitely didn't sign up for, I have decided to complain here, and if not resolved open a case of theft and ***** against them. We're now paying R15.60 interest and there's still R1178.20 outstanding. To add insult to the case, we're invoiced R86.86 for a "single number" which I never received and the "highly educated" staff at Telkom Mall@Carnival doesn't even know what this service is. A full refund for the unnecessary service, and non working "single number" is expected by the end of May 2016.