HTTP Error 524 is not a Block Error Code, its a Timeout. Maybe the Server from this Site has a Problem with your Account and the Connection Times out when it tries to Log you in. When you are sure the Website is scamming you contact your local authorities for this. Cloudflare is not a hosting Provider and cant directly do something against these Sites because Cloudflare does not host them.
You can try to fill a Abuse Report at Abuse approach - Cloudflare . Cloudflare will only accept Reports for the Kind of Reports listet on the Site