Cannot get hold of Telkom

I'm trying to get hold of Telkom to fix my internet line. My ISP says they aren't seeing the phone number syncing on their side and the connection is really bad. I've tried to call twice today. The first time my cordless phone died after being on hold for over 40mins. I'm currently trying again... so far... 45mins. Being on hold for longer then 10 - 20 mins is simply unacceptable!!