If its been over 12 hours then you submitted the wrong info or your firewall etc... is blocking scrapebox. Go to help >> test server connection, if all 6 lights are green then you submitted the wrong info.
Make sure you submit the email that you actually paid with, it will be the email that you received the "Thanks for purchasing scrapebox" email too. You can also look in your paypal and see what the primary email is.
Send that email in along with the correct transaction ID and you will be activated. I have never even had it take close to 12 hours.
http://www.scrapebox.com/scrapebox-license-transfer