Who I have the same questioned this topic

I have a nexus 6P and recently activated HD Voice. When I did this, my voice mail changed from basic to basic visual voice mail. But, when someone leaves me a voice mail, I don't get a notification icon, I get a text message from 900080006202 that looks like gibberish. Through the My Verizon app on my phone and My Verizon on the web site, I only have the choice between Basic Visual Voicemail and Premium Visual Voicemail.

How do I go back to just plain old, basic voicemail?

TIA