Another phone line will not get you another internet connection as virginmedia phone lines do not use the openreach systems the internet comes down a separate coaxial connection, and I am also afraid that VM will only install one Internet hub in each property.
I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more
Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks
If you need to extend your connection then get a mesh system or run a wired access point.
***** If you think my answer has helped - please provide me with a Kudos rating and mark as Helpful Answer!! I do not work for Virgin Media - all opinions expressed are of my own and all answers are provided from my own and past experiences. Office 365, Dynamics CRM and Cloud Computing Jedi