If you don't have an ID or you are not happy to provide your personal details for KYC (according to their privacy policy they will give your data out to 3rd parties) then you can complain about the service on the following link:
UK Information Commissioners Office
https://www.gov.uk/data-protection/make-a-complaintAccording to EU data protection laws, they can't force you to provide personal details in order to send away your coins (they are not a bank)
It would be also good to ask officials to investigate how exactly these guys storing all the 2 million user's data, as their privacy policy doesn't explain this.