You can get a refund for any app on the App Store by following this process:
1. Visit https://reportaproblem.apple.com
2. Sign In with your Apple ID.
3. Click “Report a Problem” on the offending app.
4. Choose “Problem is not listed here” and be sure to mention that you are asking for a refund because the app doesn’t work as expected.
It’s up to Apple, not individual developers, whether or not to give a refund, but they are generally willing to give refunds if a person is not blatantly abusing the system.