Shocking Telkom Service

We have a landline with Telkom which we have been experiencing problems with. In October of last year we received a call to change to a fixed line look alike. We call on a weekly basis and often more than just once a week. We have put through a number of orders of which every single one has been cancelled. The number is registered as a residential number, for what reason we don't know, and when wanting to change as we were told businesses get preference, we were told to go instore to change details. When instore, we were told they could do nothing and we had to call the call centre. As mentioned this line is a business line and it is affecting our business. The service we have received from Telkom is shocking and the worst I have ever experienced.