Poor customer service

Last week I toke out a uncapped Wi-Fi package with Telkom, to my surprise the sales agent was very on it for me to join. They had a mess up with my installation because they had my address wrong and then I tried calling them and you hold for more than half hour and still don't get through and when you do get through, THEY OFFLINE!!!!!!!!! I'm still trying to get hold of them cause they didn't even install yet and they send me a bill. I'm sending emails to cancel cause if its a rocky start how is my journey going to be with them for two years. Poor service for real