U need confirm your email to full activating your NW account, then u can activate your game with this login and password.
U havent your email from Nova probably becaus:
- antispam filter deleted this message ---- check antispam folder in your email program or better log with website;
- your email provider have blocked nova address --- use other email (prefered knowed like gmail etc or check for option called "white list" and add nova to exceptions, email is: email@example.com)
- wait few hours, sometimes nova have delays with sending emails