Hey @Fionnula123,
Welcome to the community and thanks for taking the time to post your issue on the forums.
We can arrange for a new pin to access your voicemail as this is needed to use the service outside of the UK. I would be happy to take a further look into this for you but would need to confirm a few details via private message, please look out for my message and we can get started.
Regards,
Steven_L