Telkom debiting unauthorised amount

Telkom just as I thought you couldn't get any lower, you go and prove me wrong.. The only service I ever had with Telkom, was taking out a mobile contract and realizing there is no 3G signal at my flat (something they said I could test, and then notify them within 2 weeks to cancel the contract). I requested cancellation of the contract within 2 days. I returned the phone to the Telkom shop within a month, after waiting for their consultants to \check"the signal"