As Ritatalia has stated above, if you attempt to log into the game incorrectly, you will be banned for a certain amount of time, or the ban could have been given to you for reasons inside of the game. The only thing you can do is wait until the ban has been lifted, and trying to log into the server while you're banned isn't going to help. If you've forgotten your password, there's a yellow box in the corner of the website that will allow you to reset your password via the email that you've created your account with. Click the "forgot your password?" and send a request to your email. Good luck!