If your PokerTracker 4 registration code is not listed on the PokerTracker website under My Account -> Registration Codes then your payment email address does not match your registered website email address and you were not logged into your account when you purchased.
Please proceed to send us a message with the email address that you used to purchase PokerTracker 4 along with your full real name and we will gladly link it to your account so that you can view your code on the site.