I have a Xfinity Channel that keeps showing up

I have a channel the name "Z: Channel 1495 that continues to show up all over my digital channels. The channel will show up when I change channels normally, on a different channel, like 1243, 1403, 1404, many others. I want this to stop! I can't watch my shows because this channel is taking over my TV!!! I have neber watched the 1495 channel, nor do I want to...

   Please tell me how I can get this resolved.

    Suscriber, Ray Acocella