GivEnergy Survey Flagged For Potential Phishing

I received the email from Givenergy today regarding it becoming a subscription service going forward. It asks for you to fill out the survey. However, the landing page for said survey states

" Form can no longer be accessed.

This form has been flagged for potential phishing."

Working fine here:

The form is all multiple choice click button questions, except for the last box, so I’m not sure how that could be Phishing - unless you want to put your login details into the “Anything else we should know” box (please don’t)

I couldn’t see any questions as Microsoft had blocked it with a phishing risk.