Telkom. Worse Service EVER!!!

If I could give a minus review I would. I have been having hassles with Telkom for so long I cant even remember. I have been a loyal customer since 8ta came out and was a prepaid system, and Telkom then took over. I have since taken out data sim cards on contract as well as device and data sim contract. However, when the contract is about to end, and I try to cancel the contract I end up with huge hassles. Calling their call center has proven to be of no effect as they help with absolutely nothing. I have requested that a manager call me back on countless occasion, and this goes back months, if not even into last year. But not once have I been contacted by anyone in a position that can assist. My recent issue is this...every month I pay my account as soon as I have money in my account. I make sure that their account is paid up for the month. (with regards to this, I had spoken to an agent earlier this year and he even commended me on it-unfortunately I can not remember his name as I didnt think this would come back and bite me again) Now for the past couple months I have been having an amount of over R200 added to my installment, and according to them its "rejection fee" because the account wasnt paid, but the same statement that has the rejection fees shows the amount and date that I paid the monthly installment... This is adding up on a monthly basis. This month I received statement that clearly states, with the same amount in the total column "Bank account to be debited with R162.70" which I paid (double) and a few days later I get an sms stating that my balance to pay for the month is R668.70. When I call the call center and query, they ell me about the rejection fee, which does not add up, when I dispute the rejection fee because my account is up to date they tell me that there is nothing they can do about it. I then tell her that I have been requesting a manager to call me back to resolve issues that the call center can not resolve, for a while now, and no one has called me back. I was then promised that a manager would call me back between 2 to 72 hours, and that was last week Friday (this is the case always). Monday I get an sms stating that my case has been resolved (as usual) and then an email asking me to take a survey and to rate their services. I then sent a bad survey back and was then contacted the next morning by their survey department. Again, I went through the whole process again...cancellations not been cancelled, no one calling back, added charges, billing disputes.... the same thing happened to the point that I ended up in another fight with the agent. She asked for 24 hours to go through my call records and promised to call me back, while speaking to me like a child... Needless to say, Its Friday evening and I havent received her call as yet. She did however let me know that she has asked her manager to call me back (that was Tuesday) and I still have not heard from either her or her manager... In the interim, my data sims (left with 4 sims now out of a few that have been cancelled already) are on the verge of been cut/suspended because of an error that I DID NOT make. I have been paying my account faithfully every month, even early, and on top of that I have been charged over R200 for rejection fees, and they still will not put a hold on the account while they try to resolve the issue. NO ONE has been of any assistance at all, NO ONE! No ONE calls me back! My account keeps escalating, and I have issues with cancelling my contract when it comes to the end. Telkom has been a great disappointment. Words can not express how I feel about them right now. Time spent on hundreds of calls, fights and disputes... and still....I am not in a better place than I was before all this started. In fact, I am in a worse place than before. What does a person do to get help....