About a year and a half ago, my Comcast internet service failed for about 12 hours on a Saturday evening, so I called to complain. There was no report of an outage, they lied, but they would make a note of it. The next Saturday it failed again, so I called again. They not only repeated the "no report of any problems" lie, they refused to issue me a credit because this was my first complaint (i.e, they claimed I hadn't called the week before).
So I canceled right then. The first available customer service witch made the process as difficult as possible, and insisted a technician had to come to uninstall the internet modem. Of course, no one ever showed up on the appointed day.
Comcast already had their "on-time or $20 guarantee", but when I called to complain, another Comcast witch not only cackled that wasn't I going to get my $20, but proudly boasted that she wouldn't connect me to one of their fake supervisors, and ha ha, in Illinois there is absolutely no one you can complain to. (I did have fun leading them on retaliatory wild goose chases for their equipment over the next few months).
But wait. There is a punch line.
About two weeks after I'd canceled, I got a form letter from Comcast which, after briefly apologizing for the overnight outages, explained that they were incurred during the process of doubling my area's download speed from 10Mbps to 20Mbps.
Heh. If only they hadn't trained their customer service witches to always lie first.