Tango Live Coin Purchase Charged but Coins Not Credited

I am a user of the Tango Live application and I recently experienced a payment problem. I made a coin purchase through the app using my Al Rajhi Bank card on my Android phone. The payment notification I received shows a transaction at “TngMe” in the amount of 89.86 SAR on 26/08/12 at 16:54, but the purchased coins were not added to my Tango Live account. The money has been deducted from my bank account, yet my coin balance in the application has not increased and I cannot use the coins I paid for. I checked my account and the app multiple times and there is still no change. I kindly request that you either immediately add the missing coins to my Tango Live account or fully refund the 89.86 SAR back to my card.