Poor service from telkom and im not even a client yet

I ordered a telkom adsl line and the installation date has been moved 3 times. Im also a employee of a company and cant just get off whenever i want to. So please tell me why the hell do you guys only inform me on the day of the installation that the installion has been moved. When i call the customer service department they tell if its because i did not answer my phone. I have my phone on me 24/7 so please do tell me how is that possible. Im not even a official client of Telkom and their service is already ****!!!