STILL BEING BILLED FOR CANCELLED ACCOUNT

I cancelled my adsl & telephone lines at the end February 2015 due to faulty adsl line which I could only get 2mb line speed but paid for 10mb line and not forgetting the poor installation of exposed wiring and telling me they will give me cable so that I can fix it myself then I cancelled immediately. So thinking everything was cleared, time went by then I receive automation mails saying I owe R1000+. I called to enquire, to find out that they never cancelled my account. I sent all relevant emails on 3 different occasions. So now, my account is cancelled but since 7th October till to date (9 December 2015) my cancelled account is still in debt of R1200+ which is untrue. And everyday I remind them on twitter about my dispute *** which they respond saying they will handle it or a consultant will call but never do. I have also followed up on dispute after 10 days like they said it would be resolve. I get another agent telling me 6 weeks. This is so pathetic. This has also cause my application for Telkom Mobile LTE service to be declined. Which has also affected me by loosing sponsorships, which Telkom will have to take responsibility for.