Q: illegal use of apple ID and password

You should change your Apple ID password as soon as possible, go to this page and follow the steps mentioned under "Manage your AppleID"

http://www.apple.com/support/appleid/

See if you can remove the device from your Apple ID, this article has more details:

Check your Apple ID device list to see where you're signed in - Apple Support

You're welcome

Changing your password will log the malicious user out of your account!