Rogue spider knight bundle

If the code is for Xbox, then there is no way to redeem on anything else except either the Xbox One, Microsoft redeem code website or the Microsoft store. You would also need an Xbox to play fortnite on, so you could get the Spider Knight Bundle for your
fortnite account.

The Rogue Spider Knight is the nicest looking one, in my opinion!

You will have to purchase the Xbox one s all digital

bundle to get the skin

when you redeemed the code it would tell you what you are redeeming and then ask you to confirm that you want to redeem it if that happened then you wouldn't have been scammed as it would tell you the code was already redeemed or doesn't exist if
you were scammed it could take a while for your items to appear though

The problem is that microsoft actually tells me taht my code was valid, but the in-game cosmetics don't appear in my fortnite account.

if the code was valid and redeemed properly it should appear in your account soon I'd wait a while and if it still isn't showing contact Microsoft support https://support.xbox.com/en-GB/