I set up an appointment a week and a half ago for ...

I set up an appointment a week and a half ago for 8:00am today. I took time off work to be home by 8:00am. By 8:25am they were not there, so I called to find out when they were coming. They told me the time was from 8:00am-12:00pm but that they were no longer coming today because emergencies came in and they needed to reschedule. They also told me they did not have enough information and wouldn't have been able to come out anyway. I understand that emergencies come up, but you shouldn't bump people who've set up appointments without even notifying them. That isn't a good way to run a business.