If you are having trouble purchasing gems or items, please restart your device and sign into the Azar application again.
If this does not work, please go to the Messages tab and click on the Settings icon. Then click on Help center, submit a request along with with the iTunes receipt and your Azar account so we can get all the necessary information such as the order number, purchase amount and order date for reference.
*To find your receipt: https://support.apple.com/HT204088