You're absolutely sure right? You responded by some other means than clicking a link or hitting reply on an email? Sorry to put my forensic "fascist hat" on, I know you're not an idiot, but it's so easy to get into a tunnel vision state of action when your emotions are provoked. That's what clever account takeovers are worded to do.

If it seriously is Cloudflare then the wording of that email you posted is grotesquely unprofessional.