Telkom money *******!

I have been with telkom for a few years now. This is the 3rd time they have not taken off the debit order. Today i call and they tell me it was cancelled! Who gave them permission! Now they want to charge me a extra fee for non payment! I will never advise ANYONE to ever use them! Pathetic service and im the one who has to keep paying nearly R600 extra everytime they do this!