Telkom Business and Directory account cancellation, on going problem.

We cancelled our Telkom Business account over a year ago already and we are still receiving accounts, phone calls, registered letters, etc. Firstly we are being billed for a directory that we never agreed to in the first place. We have contacted Telkom and the directory numerous times and still no proof of us agreeing to it and the account is still active. This is becoming ridiculous. We are ready to approach the ombudsman with this issue.