***** that Telkom did that lead to Incorrect Billing that affects my account

In April 2017 I called Telkom Sales to sign up for a Wireless 10GB data package with a Huawei Router for R349pm. That was done and a debit order of R450 took place and I was promised that the delivery will happen within 7 to 14 working days. I waited over a month and had to call them and follow-up, but my device and sim card was delivered after over a month. I did call them to activate the sim card and that was done, I started using the service and when my first Invoice came in, I noticed that there is an additional package on my account and I am being billed a higher amount for it. I called in to enquire and get assistance, and I was told that I need to contact sales for cancellations. I advised that I am not cancelling and all I need was to understand the Invoice and why I have an additional package on my account. No positive feedback was given to me for over a month and I got to speak to another lady who told me that I need to complete the cancellation form which I did and sent it then another one called me and asked me not to cancel and that they will fix the account and give me an additional 5GB a month for the next 6Months for the mess around. I accepted and said I won’t cancel but my bill must be fixed, and I was promised that it will be fixed that I will be credited for the incorrect payments. A month went by again and I was not sorted out as promised, my 2nd Invoice was also incorrect and I had to run around Telkom to get this sorted and no luck. I called and still not assisted and emailed them the cancellation form multiple times and when my third invoice came through. I decided to go to the bank and reverse all the debits as they were over and above the agreed contract and also called them back and I requested to speak to a manager which was Zandile Magwaza and she advised that she can see and understand what happened and will escalate to sales and have the other account removed and correct debit will proceed. I advised them that I will keep the money in my bank account and they must debit once the correct numbers are in place. The account was removed but the invoice and debits were still not fixed. I was blocked off the network even though they went through and debited my account. I called them and spoke to Nokwanda who reports to Zandile and she refused to assist me, and told me that Zandile is not in and she said she could not get another to come speak to me. She promised to email that manager my details and refused to copy me on the email and said she will forward me the email she will send but she did not stick to the promise. I am asking you to please assist me in cancelling this account as I do not want to do business with Telkom anymore as I am not a happy customer and they are not doing anything about it. I have forwarded them the cancellation form multiple times and no one bothers. Their escalation process and retention process is bad, they are a bad service provider, ***** took place on my account and no one is accountable for that. I just want to live in peace and not have to run around such an under performing service provider.