my redeem card

i paid for a redeem card which is hat got me started playing online...now my time is up which mean i have to by a nuther redeem card ,however i game a promo which is pose to let my used redeem card be redeemed, which mean i get a free redeem card right
??? however i nolonger have the redeem card or the 25 character code so is their a way that i can somehow get that code back without having the card ????

:)