CAX80 won't work at all on WOW Internet; firmware update ruined it

My CAX80 is 54 weeks old (siiiigh) and it's bricked this week. I am also told that there was an update done yesterday on WOW which is when my service quit working (in Mid Michigan). Have done soft, hard, factory resets, have requested a signal refresh. Nothing changes. Intermittently the wifi lights will not even light up. So now it fails the setup test (low signal) and we have not had any changes to a fairly new wire run and I've confirmed my coax cable is finger-tight, not damaged through the basement, etc. We have had some high winds so the other real possibility is some damage (even hyper local damage) to the lines. But I am concerned because I can't even get the CAX80 to talk to the setup wizard. When connecting a computer via ethernet it says "no internet." Grrrr. 

What else are we running on WOW successfully, and what are we expecting them to do (like send a new firmware update)? I don't have a lot of good ISP choices where we live. I'm highly annoyed to have to think about buying another router so soon. But staying dead in the water isn't a choice here either. (Nor is boosting the phone hotspot data every day thinking this is temporary.....)