Hi, I have also faced the same issue. I was told that my contract would stay the same when I moved house. I only discovered that it was changed because my virgin media bill for this month was higher than normal. I also do not want this new contract. I have asked for the transcript of the call I had with the customer service person, I feel like virgin media are scamming people into new contracts. Their website is not useable, most of the links they ask you to click to get to the right information do not work.
Also, I think they deliberately do not disclose information on their website about how moving affects your contract. Disappointed and looking forward to that transcript in July. Apparently I have to wait 45 days for it.