Can Only Access New Sales. CANT access Support or Changes to Exisitng

I have been trying to activate call forwarding the entire morning. I have tried online, online chats, emails and called to no avail. Each time I call I can only get through to new sales. Each time I select to make a change to existing service the call hangs up. I have tried more that 20 times.. Insane I know. Telkom only seems interested in new sales.