Hi agaj,
Thanks for your post and welcome to the forums. It's great having you on board with us in the Community.
I'm sorry to hear that you've had a default added to your credit file. When leaving Virgin Media, if after a final bill was produced, there was an outstanding balance then this would need to be paid.
Before registering a default, we would have tried to get in contact with you and the outstanding balance would be referred to a debt collector to try and reclaim. If it still remained outstanding, we would then update the credit file with the default.
If the teams have already confirmed the default is correct then we wouldn't be able to remove this. If there is an outstanding balance still, you can pay this and the credit default would be updated to satisfied.
I hope this explains things a little better for you.
Apologies once again.
Thanks,