Hi, I'm Bernard. I'm happy to help!
Based on your input and since it is an in-app purchase, you may need to reach out to the app publisher/developer:
https://zerobytebd.com/contact/
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Product). Thoroughly research any product advertised on the site before you decide to download and install it.