Call taking over 2 hours to answer call

I have been a customer from iburst since 2007. I moved to an iburst adsl package since a year ago. Most of the times i experance slow internet and now recently i cant send a message over whatsapp or even use facebook. Yet today my router lost my connection and does not want to connect to the internet. I used another router aswell as connect successfully to the telkom guest network. I called iBurst but after two hours of waiting on the line I hung up. My contact with iBurst is ending over a month and now I will not renew it but move to another ISP.