Hello,
Purchased 5 (3+2) Payday 2 Gifts using store credit.
3 of them was visible in the shop inventory and I was able to withdraw, the rest aren't.

This is the exact task:

144381 Payday 2 Gift - Key Credit Game Shop by MARXXX KEY 5.75 2

The other 3 arrived successfully: https://s26.postimg.org/bynp7l

Edit: got the rest, thanks.