Hi @Grensteve,
Welcome to our Community Forums! Thank you for your first post and I'm very sorry to hear that you're having issues accessing your Voicemail at the moment!
Are you in the UK at the moment? If so, you can take a look at our How To Set Up Virgin Mobile Voicemail page on our website for more information on how to do this.
If you're out of the UK and need to re-set your Voicemail PIN, please let me know and I'll be more than happy to help. 🙂
Thank you.