Unfortunately, some of our users have experienced an issue during the purchasing process of our app. If money was deducted from your account, but the app still appears as you need to buy it, please note that most probably an error occurred during the purchasing process. If that's the case, Google will automatically refund your purchase, usually within 3-5 business days. You can also check the status of your purchase on https://payments.google.com/.
If the issue persists, don't hesitate to contact Google Play support. All purchases go through them, and they will be able to check and advise on how to proceed.