Telkom unable to perform simple request

We have 2 Telkom landlines. The one is used for outgoing calls and for Telkom internet.

Now this whole week I am trying to cancel my Telkom internet. I have phoned twice, but after 20mins gave up on listening to pre recorded messages. Ive sent emails. No reply. I left a message on their Facebook page. And got a response saying I must register and on the Telkom.co.za website and cancel the service from there. I then registered. Trying to link the account I get a message "Cannot associate this service, it requires approval". So we are back at square 1. Secondly I do not want to cancel the phone line. I just want to cancel the internet. But I am pretty sure Telkom will cut the phone line and adsl together while I just want the internet cancelled. It seems like they are making it extremely difficult to cancel their services as they do not want to loose clients.