Rooter Plus

I took the day off work today because I had a scheduled appointment from 12:00 - 4:00 with Rooter Plus to pump my septic tank. Well, I scheduled the appointment two weeks ago. At 12:00 today, I called them to ensure that they still had me on the schedule and that they were still coming out. They confirmed. Well, I received a call from them at 4:30 stating they would not be able to come out. What happened to common courtesy or good customer service? I guess they are too busy for that. That's fine, I will gladly find another company that needs the business.