Telkom debits account double

Previously I had some trouble with my bank and decided to go to another bank. I then paid my contract R399 cash for 2 months. My wifi was disconnected and I phoned in to ask why. I was then told that I have been penalized for making cash payments R200 per month. That month Telkom took over R800 for penalties and to reconnect. I phoned and gave my new account for debit order as I cannot afford such high penalties. Telkom did not debit my account on 1 August as I asked and on 2 August I phoned to ask why. They told me the debit order bounced. It was impossible so I enquired why. They again debited the wrong account and did not update my new bank account as I asked in July already. On the 15 August my account was debited with R797!!!! After I told them I do not give authority for them to take that much. Well today is 26 August and my wifi is still disconnected. So again like the other month after paying what I should I am losing 40 gig and I have paid for it..... How can it be my mistake if I indeed changed my account details but telkom did not update their system as promised? How can they just take double the contract ammount after I specifically told them they have no authority to do so and how can my wifi still be off after they took double payment on the 15th already? The money was supposed to be available for my little girl for new balet shoes for her exam and because of telkom taking double payment my child could not participate in her exam. How is this fair to my child? Its unacceptable and I want to know why I should now lose 40 gig wifi because of a telkom fault. I have paid for it after all!!!! I am so sick and tired of calling telkom. This month already I have made calls over 120 minutes and still I am where I started and nobody can do nothing