Disconnect early left without no service.
I cancelled my contract on 19th October 23, giving 30 day notice, I was disconnected from all of my package on 30th October 23, phone,TV and broadband. I called and up several times explaining I was still on contract until middle November 23. The crap person on the phone could only say that because I was transferring my number yo to sky that I had lost all of my package. I asked speak to some higher up but was told that this couldn't be done and I was now fully disconnected. But if I wanted to reconnect I could take out a new 18 month contract. On my second attempt to explain on char was that my mother who lives with me has a pendent alarm which needed a phone line, that person said there was nothing they could do. To my surprise a relieved a phone about 1hr later stating that I had contacted them about getting broadband and TV., I was gob smacked. Virgin have the worst and unhelpful customer services will never use them again.
You can share your unhappy cancellation experience with OFCOM.
They launched an investigation into VM on 13 July 2023 specifically into VM's cancellation and complaints processes.
https://www.ofcom.org.uk/about-ofcom/bulletins/enforcement-bulletin/open-cases/cw_01275
Case ref. no. and an email at the bottom of the above page or submit with same info via the contact form
https://ofcomforms.secure.force.com/formentry/SitesFormCCTMonitoring
Submitting information won't help your individual complaint but it will contribute to the OFCOM investigation and it sounds like your experience is directly relevant to the terms of reference of the investigation.