Hi markib,
Thanks for posting on the Community Forums.
I'm sorry to hear you're having issues with your passcode. Would you please be able to clarify which passcode you're referring to? Do you mean your security answer for when you call us i.e the 3 requested characters?
For mobile accounts, they are linked to your online My Virgin Mobile password. You'll be able to reset the password online either from inside your account or if you've forgotten it, you can go down the 'forgotten my password' route.
Hope this helps
Beth