Lousy customer support!

I am beyond frustrated with the treatment I've received from comcast customer service.  I moved my business and scheduled an appointment to have the service transferred on the same day as the move to avoid a lapse in phone service.  When the installers failed to show up within the agreed upon time window, I contacted customer service again.  I was told that the installer would be sent out that afternoon.  Again, I was stood up with no notification.  No courtesy email or phone call.  I contacted customer service yet again, agreeing to wait at my office on Saturday.  Stood up for the third time with no phone call!  If I didn't need internet service I would use AT&T for my phone service.