Business phone disconnected- Telkom incompetance

I changed my banking details fro my company and tried to get Telkom \customer service"to change this over the phone. They could not do this and said I need to go to one of their outlets. I went to the Claremont branch and waited in a queue for about an hour. I was then given a form to complete and was told that they would give this to the relevant department and they would update my details. Guess what? It did not happen"