Directv MasTec 2 No Show Install Appointments Nationwide

I had a previously scheduled installation of Directv and 3 genies for Oct 8th from 12-4p and after several attempts for an update on install day I was told at 8p it was cancelled due to lack of man power. It was then rescheduled for today, Oct 16th from 12-4p and after receiving confirmation texts the afternoon of Oct 15th and the morning of the install, today, I called at 3p looking for a status update. I was told that the install is now scheduled for Oct 18th. I had taken off 2 days from work for an install that never occurred twice! AT&T Directv was unable to explain or rectify and referred the blame to MasTec. MasTec even has problems contacting their local dispatch when exculating my concern.