Yes, that happened to us several weeks ago. We are cutting the cable cord soon, and while there are only a few channels we will miss QVC is one of them. I'll just have to watch on my laptop instead!
That used to happen to me too when I had Time Warner years ago. AT&T U-Verse is what I've had for the past 9 years, and they don't do that, but they do add channels (most of which I'll never watch).
Got a notice from TWC, now sometimes known as Spectrum, that they will be all digital for some channels, including QVC. This will happen sometime between now and eternity. Every day an adventure!
I also have Time Warner (now Spectrum). without notice, some of my favorite channels were changed. QVC is now on 480 and 481. I knew all my favorite channels by heart.
They didn't even tell us they were changing the channels.