Lack of service providing after numerous attempts

I accepted a tablet deal from Sell Direct at R99p/m and it ended up that a second tablet was added to my account. After a lot of calls and zero feedback from Telkom I decided to stop my debit order up until the matter was resolved. I went to Telkom and requested my latest statement to be paid via EFT. Telkom acknowledged payment received with Telkom invoice. Total amount due R4791.65 31/04/15 there is an error in this statement as we did make payment for the month the debit order was cancelled. I made an effort to start resolving it, my first attempted was with #A then #B. Also spoke to consultant #C, send email with explaination.I spoke to #D 30/3/15 she said she will escalated my cases to the Manager #E whom I also spoke to. 31/03/15 I spoke to #F as #E did not get back to me. 31/03/15 I called head office & spoke to #G who answered and then continued to not speak for 5 min after which I hung up, further attempts to call failed with no one answering, I logged an escalation complaint on the Telkom site.I also send POP to Nudebt for my name to be cleared from the system. It is at a point now where I am embarrassed to be associated with the Telkom.