Closed account given to Debt Collectors

I closed my telkom account on 30 Oct 2014 for 30 Nov 14 - received the final account and paid it in Jan. Still receive accounts. I phoned 21 Jan and again confirmed the cancellation. Now I get demand letters from TELKOM and a Debt collector is on my back now. This is unacceptable service. I send an email to [Email Removed] on 12 May regarding this - this email was read on 8 June only and still no one phoned me or answered my email. I send an email to [Email Removed] on 2 June - no answer to this email. I send emails to various people on : 16 Jan 15, 20 Jan 15, 27 Jan 15, 9 Feb 15, 13 Feb 15, 2 June 15, 3 June, 4 Aug and today again - no reply at all, not even to say I AM WORKING ON YOUR QUERY. I think this is rediculous. They will now have to pay for the service they hired to collect money unnecessary because someone did not do his/her job properley!<br>