First of all, do not worry!
Please note that if any installs are not delivered, the system refunds the amount paid for undelivered downloads automatically.
If you have checked the install in your Google Developer Console or Apple AppStore Connect and see that not all of them are reflected, make sure that the order was completed 2-3 days ago, as this time is usually needed for the Store to reflect the installs in Statistics.
If your installs were not reflected even 2-3 days after the order was completed, don’t hesitate to contact the support department or your personal manager in any convenient for you messenger. They will explain the reason and help to solve this problem.