VIP legendary im not getting marks

there is this legendary weapon in the vault insider program that you need to claim 8 rewards in order to get it and i bought 2 wallpapers with the points from the rewards and didnt get any marks to the legendary weapon

It says weapons rewards, not any rewards like wallpapers.

Claim at least eight VIP reward weapons to unlock a special Legendary Maliwan gun for Borderlands 3.