Can't delete Live Voicemail messages

Thanks, Derek. Unfortunately, this appears to be an iOS 17 problem. On a chat exchange, Apple had me reset the network settings. Once I did that, a list of four items showed on the Voicemail page -- the three Live Voicemails plus a line (with a blue dot in front) that reads "Carrier Voicemail" that includes a "Call" button. I was then able to delete the three Live Voicemails. To delete the "Carrier Voicemail" item, Apple instructed me to contact my carrier (T-Mobile), have them activate my voicemail so I could press that Call button to access and delete any regular carrier-based voicemails, then I could have T-Mobile deactivate it again. But when I called T-Mobile, they told me that there are no voicemails in my account. It's completely clear. They told me the "Carrier Voicemail" line on the Voicemail page is an iOS 17 thing on Apple's end. The only way to get it to go away is to reactivate my Voicemails permanently, which I don't want to do. And not only do I have the "Carrier Voicemail" line on the Voicemail page, but there is also a permanent red badge (with no number in it) on the Phone app icon on my Home Screen. And I'm not the only person with this issue. I read a similar iOS 17 complaint about the same issue on another forum.