To recover your account you can click login at the right top of your screen:
Then this will show up:
Click "Forgot Password?" and this will show up:
Enter the your brother's email address then check your brother's email, it will gives you further instruction. Once you changed the password, remember to change the email as well.
You can try this:
Go to this page : http://www.aeriagames.com/contact/recover
Fill everything that is needed, you will receive a respond within 72 days.