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

I'm experiencing the same issue with my CAX80 and WOW isp in Chicago area. Stopped working about 2 weeks ago (worked fine for approximately 1 year) and recently had a WOW technician out to my house. Switched me to my old Motorola modem/router which works but is a temporary solution because it doesn't support full speed I'm getting from WOW. Switched back to my CAX80 to troubleshoot and had a ticket setup with Netgear. Waited 1.5 hours on hold to speak to someone. Had an appointment I had to be at and never anticipated being on hold that long so was only was able to speak to the first Netgear rep for a few minutes. Called back and they had me do troubleshooting to connect to router. Practically begged both Netgear reps I spoke with to look at these forum posts because I feel they accurately describe what is going on and might point toward a larger issue outside of individual hardware. They weren't interested. First rep laughed then told me it wasn't possible that WOW internet wouldn't work on their modems because of all modems being built to ISO standards. Second rep told me to buy a new modem/router and there was nothing they could do. I was told I might possibly hear back from someone via email if they discover a work around but I'm not holding my breath. Feel like I was just told that to get me off the line at that point.

Incredibly frustrating - I think Netgear could learn a lot from what has been posted here by others but it appears to me that the reps have their standard check the box troubleshooting steps they have to follow and won't deviate from that. I'm convinced based off the posts of others, buying a new one would accomplish nothing other than wasting my money. Netgear comes off with being far more concerned about getting you to sign up for their tech support plans than actually listening to a customer.