3G Wireless Home Phone Upgrade Emergency

On 2/14/2022 AT&T notified me for the very first time that my WF721 wireless home phone will be deactivated by the 3G sunset on 2/22/2022. I have obsessively called AT&T's 3G upgrade hotline at (800) 880-8581 every day since this emergency was revealed to me. No one at that number is able to order a replacement device and obtain confirmation.

I have also tried acceptfreephone.att.com but that page will not load using AT&T internet(!) I tried from a different location with Spectrum internet and the page loaded, but will not accept my AT&T wireless home phone number to begin the order.

My AT&T online account displays an "Upgrade Now" button on my Wireless Home Phone page. Clicking the button generates an error instructing me to call customer service at (800) 331-0500. No one at that number is able to perform the upgrade.

As I write this at 5:30pm, the celestial sunset currently underway provides a stark reminder of today's 3G sunset which threatens to permanently end my phone service any moment now.

Is there anyone at any level of the AT&T corporation who is able to facilitate this upgrade and rescue a decades-long customer from forced annihilation?