I'm having exactly the same problem. I have never experienced anything like it. For three days I have been trying to get through to Virgin Media.
The first phone call was cut off after 30 mins. Then I was waiting on live chat for one hour and was moved to a Whatsapp chat. I received a message three hours later. The agent tried to get me to stay. I said no. I then received a message (in the same Whatsapp chat) from a bot informing me that the disconnection team was closed.
I had the same result over the next two days. I placed in a complaint to Virgin Media on the second day via Virgins website.
I will not pay any monies past my 30 day notice period. Which is 01.03.22) I kept all my Whatsapp conversations and printed them off.
I am sick to the back teeth of this incompetent & amateurish (Virgin Media) company. I urge everyone to stay away.