They ignore cancellation requests

Oh my word where do I even begin! I'll try to summarise. I had data account with telkom, requested for a cancellation in June, the consultant at the store tells me that I need to provide a 30 days notice, so the last debit would be in July. Fine. To my frustration, I am debited in August. I go to a telkom store, not the same one I had gone to initially, to seek assistance. Nobody can assist, they call customer service, billing, nobody can assist. eventually I am given an email address which I email, still nobody can assist. At this point I have logged a cancellation request again at this current store, which they promised would be actioned, but the 30 days notice applies again. So they try to debit my account, they find no money, which is why I was cancelling in the first place. Eventually my account goes to arrears and NuDebt contacts me about the account. I make an arrangement with them to pay R100 per month until my debt is cleared. Tell me why Telkom goes ahead and debits the full amount from my account???? I reversed it, called them and told them that my account was transferred to NuDebt and I made an arrangement with them. I wanted to speak to somebody in charge which I never got to. As I type this, they said the supervisor would call me back but that hasn't happened. It has been six months of frustration with Telkom, nobody knows anything, nobody replies to any contact you make to them. It's a big organisation full of *********** staff and inconsistent processes. It's been a real pain.