Cant buy coins

Dear all,

I'm trying to buy coins but i'm unable to. When i click on "buy coins" it forwards me to the buy coins page but with no details.

The snapshot is attached

[Koenaj]

Are you sure you're logged in at the App Store? If you are, you might want to log out and log back in.
After that, do the following :
Force-kill your App (double tap home button and remove Haypi Monsters from the list).
Shut down your phone completely (holy down the button on the top for 2-3 seconds)
If that doesn't solve it, it's not on your side, but either on Apples of Haypi's side.

Best of luck!