Finally had a reply from Jeremy Wright, basically telling me that I need to contact the Home Office. Interestingly, top story published on Home Office website today is this
https://www.gov.uk/government/news/tackling-child-sexual-exploitation-online
One quote being that Sajid Javid is expecting technology companies to 'stop child grooming taking place on their platforms'
I'm going to email him about this case and see what, if anything, can be done. I don't know if anyone else wants to, I'm thinking strength in numbers. The email address I got told to contact is
[email protected]