Trap customers and unfair charges

If I could give a negative star I would. Telkom uses very ********* patterns and trap their customers into not being able to cancel or resolve issues correctly. I was charged a very high amount on my bill, and when I called to find out about it, I was told it was due to an early upgrade. I never did an upgrade. I was told it would get investigated. When I followed up I was told it takes a couple of days (differing information from what I heard from the first agent) I waited the days that past and my account got charged. I had to ask my bank to reverse the debit order (which I got charged for). This case was logged in January and I am still waiting for it to get resolved. I have called numerous times, tried going into a branch and nothing gets resolved. Every month I am getting charged a penalty but I don't owe this money!!! I just want to leave Telkom and never have to deal with this brand ever again!! TERRIBLE TERRIBLE TERRIBLE!!