Right, select that and see if there is anything other than .txt files.
There's nothing other than .txt files.
And did you find under Apps>Voice Mail?
There are no messages anywhere.
And the Voicemail Indicator is still there.
I'm guessing that is a "yes, I checked in app>voice mail and deleted even the deleted e-mails." you can turn your airplane mode on for a minute and then back off; that will reacquire the network and it might be something on their end.
deleted Voicemails* not e-mails.
No luck. I did all that and even turned my phone off. It's still there.
Bummer. You can Google the issue; it seems to be pretty common. I know I've experienced, but generally one of those fixes it.