You're looking at SE mebers (social) page - having game "registered" there has no meaning or any impact on the actual game code registrationm. Where ther game must show as registered is the Mogstation - there you can enter your registration code as well as add / renew subs etc.

If you've purchased the digital download verssion of the game (PC) you've recevied the (live, not beta or EA) game registration code - check your SPAM box! If you have physical copy of the game tho code it's printed on the separate voucher in the game box - 20 digit for PC or 12 digit for PS3.