OK I think I've attached it. Crossing my fingers.

Hi everyone, I need some advice. Virgin Media sent me a letter last year saying I would be getting upgraded to the 50MB broadband service. I'm currently on 20MB and I find uploading files tedious. I recently corresponded with Virgin Media on Twitter to find out why I had not been upgraded. They told me to login to my account online and click a button to begin the process. I followed the web form and it did indeed say it was free. However I logged into the main dashboard where I saw the same upgrade option yet it cost an extra £2.85 a month. From what I can gather the upgrade is not free at all and the only reason they state it's free is so customers bind themselves to another 12 month contract. My first question would be is this illegal under UK law? My second question is Where can I report them to inflict the most damage? I've sent screenshots to the advertising standards authority But who else can I contact? I've included a screenshot.