I've recently had this issue too.
My iPhone recently stopped working and needed to get a new mobile device as soon as possible. Since its a necessity at my work place.
I'm currently with another Mobile Service Provider. However, I'm not happy with their services. Especially their customer services. So I decided to check out what Virgin Media had to offer. Since I'm also a Broadband customer and have been using Virgin Media Broadband for a couple of years now and recently upgraded to M350.
I tried ordering an iPhone 11 Pro Max with AirPods. However, all I received was an email redirecting me to a webpage. "Parked".
Is something wrong with my account?
Really wanted to give Virgin Media a try.