To better help you, please go to the Menu(≡) located at the top left corner of the screen, click on "Settings". Then click "Go to Help Center" and submit a request with the following information.
1. Why you would like a refund
2. The Azar Web Account you have purchased the Coins with
3. The amount and exact time, including minutes, of the Coins you have purchased
4. A screenshot of the purchase made