Reliance Home Comfort

I had a service appointment in the ridiculously long window of 10-2 today. I rescheduled my day off to make sure i was around during this time. 2:15 rolls around and no one has shown up or contacted me. I had to call in to be told that “dispatch needs to rebook” with no reasoning other than they wont be able to make it today. Im sure this was known a while ago and a courtesy clall would have made a world of difference. Now im left without AC until Friday during a heat wave. Very poor customer service...