Lazy developers

I play PS2 on ps4 and let's say I payed money for some camos "which I actually did" and it says "this camo is applyable to characters, vehicles and WEAPONS" you probably know what I mean here right? Weapons? Camos? Anyways on ps4 you do not get camos for weapons even though it's clearly written when you buy them, so question here, are the developers actually abusing this and that I can get my 20$ refund?