Account got flagged by automatic fraud protection system when logging in using github

Don’t directly email support@netlify as I believe they still have an auto-responder that will reject your request (as you experienced).

To create a support ticket with the right team at Netlify:

Read and follow this Support Guide https://answers.netlify.com/t/support-guide-help-i-cant-login-to-my-netlify-account/119360