J Ending these agreements
a. Virgin Media Ltd, Virgin Media Entertainment and/or Virgin Media Payments increase their respective charges under these agreements;
You may cancel those services affected without penalty by giving Virgin Media Ltd and/or Virgin Media Entertainment (as applicable) at least 30 days' notice in writing. Such notice must be given within 30 days of the increase in charges or changes to the services or this agreement being notified to you. If you were not notified of these changes in advance, you must give notice of cancellation of the services affected to Virgin Media Ltd and/or Virgin Media Entertainment (as applicable) within 30 days of receipt of your first bill following such increase in charges.
I think that is quite clear