Extremely disgusting service

My pay date being 25th in February after changing my bank details I noticed they never deducted but was advised it would go off. I called the 26 February and they advised me it won't go off. I did an EFT only to see the next day they debited my account. My bill is R998 and I did not just have another R998 laying around to give away I called up to request a refund as I did not want to reverse they made a case and never ever ever got back to me up until now. I've made numerous calls spoke to numerous managers who never once called back to let me know anything the last week before pay day I had no money and I needed to get to work and buy food I was then forced to reverse and they continued to not contact me after I've attempted numerous times to get the matter sorted even way pass the turn around time. It was sorted till I got my bill this month to see they charged me R200 for reversing. I explained the situation and yet they still try to clarify why they charged me. Need I note I've attempted to get them to refund me and called so much times and still nothing. I went into the branch and they refused to let me speak to the manager they just said they only do sales and they can't help. I've been with telkom for years took out numerous contracts and being treated like this when I've never ever avoided paying them is pathetic. I am disgusted and want the charge to be removed.