Thanks for your post on the Forum and welcome. I'm sorry to hear that you've changed your mind and want to cancel your order.
J0hn is correct, in order to cancel this, you will need to get in touch direct as the Forum Team are not able to process cancellations.
Please contact us on 789 or 0345 6000 789 (from any other phone) or 150 (free from a Virgin Media landline) within the UK or get in touch with us via WebChat: Contact Us. Also, you can contact us when you're travelling abroad by calling +447953967967(call charges apply).
Virgin Media Forum Team
Need help changing SIM card? Find out more about activating your 4G ready SIM. 4G SIM Swap Help