I don’t think that is the issue. Let’s wait for the user for a response. I have a lot of users who got the same issue like this user before and after changing their password to a temporary one and send it though their email address that we have on file, they able to login and changed.
That being the case, you'll have to PM an admin a pic of your and your brother's government issued ID card. Since you're an Indian (I assume from your username) you can send pics of both of yours Aadhar Card should do.(Cuz that's issued even if you're not an adult yet)