Thanks for your post and for reaching out to the Community Forums, Trev_Allen,
Sorry to hear that you are having voicemail issues. You would not be able to reset the pin from your online account. But if you are needing help with resetting your online password you can do so here: https://my.virginmedia.com/forgot-details/password
I'll also send you a private message to confirm your account details.
Cheers,
Corey C