Telkom billed me twice in one month

Telkom billed me twice for my ADSL line I am fed up with Telkom's billing errors it is not the first time this happened and every time I have to phone in and enquire what happened and no one can give me a reason or a straight answer. I am highly disappointed in Telkom!!! I am writing this message on HALLOPETER now and don't even know if anyone will phone me back.