Deluxe edition content missing

Hello. 2 years ago i bought garden warfare 2 on steam, created an ea account, got all the deluxe content and went on to progress the account a long way in. Then, a few weeks ago, when the game went for sale on steam, i thought: hey, why dont i buy the game on my alt steam account and start all over just for fun? So i did it, created another ea account, assigned it to my main steam account just for convenience, and the old ea account was linked with my alt steam account (sorry if that sounds confusing). One problem occured: turns out that the deluxe edition steam key that my main account had was only a single-time use, so when i linked it with the new ea account, i didn't get any of the deluxe edition content that was supposed to come with it. So now im left with an alt steam account that has a deluxe edition key which is useless because i already have the deluxe content on the ea account it's associated with, and a main steam account with an already used before key. I think i could try linking the steam that has the working key and then reverting it after im done, but then I'll have to wait a whole year because of the ea restrictions on account linking. Is there a way i can either get a second deluxe edition key or atleast the missing packs for my account so i finally get the content i paid for? The main steam account's username is skilledtoaster and the now linked to it ea account is LiverAndOnions67, the alt steam account username is doktorkto62 and the associated ea account is TucoSalamanca6 (the one im writing from). Please help!