Go to: https://help.ea.com/en/contact-us/?prod ... latform=pc and start a new case, select live chat and wait (a while).
Tell the support rep that you brought Battlefield 1942 CD copy and you tried to register the code on origin but it did not work (or something like that).
Then he will ask for the code, your name? (not every time) and your email. A couple of minutes later... Tada!
