Yes, I was having a cable box issue and was scheduled for a service appointment. They called several times, but never left a message. Once I looked up the number on 800notes, I answered the next call and it was in fact a follow-up scheduling call from Comcast.
Yeah they called for some appointment reminder that i never scheduled. I have to wonder if its some sort of marketing ploy to get you to be there when they come around. In any case it is not appreciated.