Basicaly the title says everything any help ?
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First purchase may take a while to register. On Steam, I think it may take 24 hours or so. Maybe more. Contact support after 48 hours. Save any emails you may have obtained from the transaction.
Here's the note from the AC Steam shop page.
It may take up to 24 hours for the product to be reflected upon your first billed purchase. If over 48 hours have passed and the product has still not been reflected, please contact us through the Phantasy Star Online 2 Official Website
Not sure whether you had the game open during the purchase but if you didn't it's always best to make the purchase before opening the game. Or to relog into your account when you make a purchase, because it's just more likely the game will receive the data if it's given time to find out you made that purchase. It should refresh that info automatically, but sometimes games just decide they need an extra push to realize that.
@Riesz I buy AC and ragol packs and the other things always with the game open and have never had issues. It takes like 20 seconds after the purchase and then it appears at the visiphone or my AC balance.