If you didnt' get credit after purchasing it on Google Play store the you need to let us know Order ID or Transaction ID in order for us to find out purchase. We will credit this missing purchase once we have the transaction ID or Order ID.
Transaction ID or Order ID will be in following format:
When you purchase Google sends you order details by email. If you can't find order in the emails then you can go to following URL and find out order ID
Click on the order details and at the bottom you will see Transaction ID