Sword Art Online Fatal Bullet DLC problems

Edited For a little More clarity.

Alright so basically my problem is I've bought all the dlcs for SAO:Fatal Bullet along with the season pass, and The last of the 4 main dlc says it comes with all those smaller dlc adding items and what not. One of which is the danbo head accessory well recently
i tried to play the game and it said I had an error and I need to install said head accessory.I checked my add-ons and I still had it installed so I thought maybe I need to uninstall and reinstall to fix it. I uninstalled it and then went to reinstall it to
which xbox tells me I don't own the Add-on anymore and I must redeem a code in order to get it again. I normally wouldn't care about losing this dlc if it didn't cost me losing access my main account that I've played on all this time.

So that sums up my problem any help would be appreciated. I would hate to have to pay 39.99 to buy everything I already own to to get the one ad-on the keeping me from playing my main account.

:)