Problems with every aspect of my TV service

I am having problems with pixelation, constant freezing of channels, channels that I cannot access (the channels that I cannot access seems to change daily) error codes, channels that will play when the guide is open, but not when I exit the guide, channels and recordings that go back and forth between HD and lo res ... Anyone else having problems with literally every part of their service? So far, the "fix" from Comcast has been restarts, and refreshing the box. Neither of which has done anything at all to help.