Being billed for a line i don't even have

My husband and I moved to a new complex last year November. A month prior to the move, we let telkom know that we will be moving and that we would be needing a new line for the new place. We have been waiting since. We moved November 2014. It is May 2015. After numerous calls, emails and even visiting one of the branches, numerous times in Centurion mall, nothing! All they give us is an outstanding account for a line we don't even have, and that they refuse to help if we don't pay the account. We have given them notice that we were moving, a month prior to the actual move. We have tried to settle this matter for the outstanding amount, trying to point out that the mistake is on their side and not ours, and that we DON'T owe anything, we don't even have a line?? Before we moved, we waited 8 MONTHS for our last line. This is ridiculous. We have even tried contacting the head of management, but still nothing. We will not pay for something we don't even have and no one seems capable of even wanting to try and sort this out . Which is not our problem, but theirs, but they are making it ours.