HI @cardaw01 ,
What happens when you press the ''Menu/Select button'' on the phone when you reach the Global Setup Menu?
If you have a Uniden D1760 phone (is this your model?) there should be at least 6 further options to scroll down (up?) through, including VMWI reset.
Here's a link to the [https://www.101phones.com/content/pdf/uniden/D1760.pdf|user manual] for the phone. Scroll to p.7 to view the list of options or p.13 to view the reset procedure shown under Voice Message Notification