Hey @adina35, thanks for reaching out to us and a warm welcome to the Virgin Media forums.
I'm sorry to hear about the issues you're facing when trying to cancel your services 😞
The address can be found here: Virgin Media Sales Operation Support, Virgin Media, Sunderland, SR43 4AA.
Alternatively you can message us via WhatsApp on: +447305 327 112 and the team can get this doen for you there.
Let us know how it goes with the team or with the letter.
Kind regards,
Ilyas.