This is what I posted back in July after VM solved my issue. See if this helps:
THEY FIXED IT!
It turns out that there are issues with Sky services recognising the new device and also some oddity between identifying WiFi and mobile data signals. I had to remove my old phone as a registered device from the TV settings page and go back to tvgo, choose any standard channel to register the phone and THEN try the subscription channels. This worked. He did, however, initially instruct me to access tvgo via the Internet and NOT the app for this set up, usinghttps://virgintvgo.virginmedia.com(and if the phone asks how to open it, tvgo app or Internet, choose Internet). I hope this helps someone else.
Rather than going via the TV Go page, open up Sky Sports directly and see if that makes any difference.
You should be able to access which devices are registered for Sky by going to the TV Go homepage > Settings > Device Management > Under your registered devices for TV Go you should see: Manage my Sky Devices
Once you've checked these, as mentioned above go to the Sky Sports page directly and try again.
Strangely the Sky devices don’t appear when I do as instructed via a my iPad but it does appear when my husband checks when accessing via the tv go website on his MacBook.
During our long convoluted chat with a Virgin Online agent, all devices were cancelled and re installed but we are still no further forward
i have never entered Sky Sports via TV Go as I was unaware that I could do so. Having tried both methods of access I am still no further forward, I’m afraid.
I apologise for posting several times on this topic but this was unaware that replying to other people’s posts would cause difficulty; I merely wished to add weight towards the fact that others were experiencing the same problem.
I had an email about 18 months to 2 years ago before that Sky sports could be watched on my laptop no problem updated to the latest version zip nothing called Virgin techy guy still waiting on a reply , Ive not seen Sky sports on Virgin Go for over a year .
Tonight after a nice christmas I decided after a long day to continue watching The Fugitive in bed on the laptop low and behold that channel isnt there ????just full of surprises Virgin aint they. it just gets worse and worse constantly having connection problems resetting every week pain in the bum ,oh and the call backs they are as rare as hens teeth.,got to be something better out there this is dire.
Nope still in limbo nearly 2 years now well it seems like that, I`d put it to the back of mind Ive not tried to watch for months, has there been an upgrade I was informed all those months ago that there would be as, "They know about it".
Over 10 years a Virgin customer Ben ,why I ask myself .
If you can get any info that would be great or a link to resolve this ongoing pain it would be most welcome