Voicemail app stopped working and Xfinity seems to not understand..

My Android S21 used to give me a notification when a caller left a voicemail.. pretty useful feature and well, an extremely standard feature. (xfinity did sell me a phone.. not a tablet)

As near as I can tell this stopped working around November of last year, presumably from an update as nothing has changed on my side. Working with support seems very underwhelming, most of the call is devoted to the exact same actions of..

1. Explain that normal voice mail works and somehow navigate the conversation to the visual voicemail app
2. reset the network repeatedly (which is extremely annoying because I lose my WIFI settings)
3. Escalate my issue (which at that point I never hear anything again)

Is this normal?? Does this screen not infer Xfinity should know something about this? 

Does anyone else have this issue and resolved it somehow?