Thank you for your post and welcome to the community!
I can confirm that both numbers are not genuine Virgin Media contact numbers. All our official contact numbers can be found here. If you believe that you have been contacted by a scam caller, more information can be found here on how to deal with suspicious calls: https://www.virginmedia.com/help/home-phone-nuisance-calls
Have you been contacted by these numbers and if so, what happened during the call?