Telkom Account

Telkom just decided to add an exuberant amount on my account after I paid off one of my devices. Apparently now I owe x20 on my account for I device I do not have. It has been 3 weeks I have been querying this balance and I have been sent from pillar to post. Just when I thought things couldn't get any worse they debited all my money x20. How does one do that? No one is helping me, I have to explain everything over and over again to the consultants everyday. Apparently my case has been allocated to someone but no one does anything. The worst service ever, would not recommend their service to anyone. At his point the next step is the ombudsman.