You could respect more the Windows Phone users who consume the products of FlareGames until today we do not have the signatures and we will not have the visa armistice package either, you should not differentiate the game by platform that is wrong should be the same for all the game becomes unbalanced.
Windows phone was useless when it was still alive and is even more useless now. So you can’t really blame the devs for neglecting a platform that is neglected even by it’s own creators.
Though it’s unfair and sad indeed.
Since you obviously seem like you want to buy this package, why don’t you just donate to the UK War Child Charity if you can’t buy the skins (I have to admit, it would be cool to get the skins with it).