XBOX 1S Fortnite Edition - Missing Promo code - VBucks - Skin - Glider - Pickaxe

Hi, we gave our son an Xbox One S for christmas, Fortnite edition, but he haven't
received any vBucks, skin, glider or pickaxe, that was supposed to be part of that package.

I contacted Epic Games, but they say we are missing a promo code that should have been included in the package. We do have the Game Pass/Xbox Live Gold promo card. But not the Fortnite one. I cannot say
for certain if it went into the garbage. But it wasn't to be found with the other contents, where I found the other promo codes.

My son has been very patient, but I can understand that he want's this stuff.

How do we proceed, what information do you need?

:)