Thanks for your post and for reaching out to the Community Forums, Pcd24,
Sorry to hear that you have been having landline issues. We would be unable to advise what the nature of the fault might be. It may be network related, however if nothing has been posted on the service status page: https://my.virginmedia.com/faults/service-status
Then it will require the engineer to come out and have a look at your connection and make that assessment.