Best Evaporative Coolers in North Las Vegas NV

Got a call saying technical would be here within 30 -45 min and that was at 604pm it is now 751 and still no one. Called to see when they would be here and they said sorry for the inconvenience but we will send someone at 830pm. I totally get that technicians run late, but not 3 hours late after they called saying they are on the way and will show up in 30-45 min . I had to call and then was told they would be there by 830 and then got another call saying they will be there soon and show up after 9. Just would have liked the technicians to call and say they are running behind. Should have to call and see what's going on 4 hours after the scheduled time frame