Lost our CBS channel in Nashville in the middle of a show!

All of a sudden, we lost our CBS station in Nashville with some sort of lame explanation about contract negotiations.  I have been a Comcast member for almost 28 years and have thought about cancelling several times as your monthly fees are so high.  Guess it's now time to leave.  AT&T just put fiber in our neighborhood and offering service must cheaper than you.  Looks like it's time to say goodbye.  It's' ridiculous to pay this much per month and then have channels removed with no warning in the middle of a show!