Horrible Service from Telkom about Accounts that were not closed properly by an agent 3 years ago.

I have experienced horrible customer service from Telkom. I checked my Experian records and found out that Telkom has not closed a account that I had with them 3 years ago. I have requested 6 call backs , sent countless messages on line , I tried calling the telkom number from my cellphone , I even went to a Telkom branch but still no assistance. I keep getting told that there needs to be an investigation into the account enquiry as the house was sold to someone else , and the line was never closed as per my request. I also would not keep proof of closure 3 years later especially when nobody contacted me for any any account billing etc in a space of 3 years. How can I have an active account for 3 years and not pay the account ? Clearly due to the incompetence of someone who couldn't do their job properly , I am impacted. Can someone please contact me urgently on *** related to Ref ***4