For IOS purchases:
Head to your app, More page > Account Settings > Relink subscription, if that doesn't work, try to kill the app and reopen.
For Android purchases:
Click on this link: https://glowing.com/debug/premium_status. Please make sure to access only via your Android device, find the correct transaction then click on redeem.
If you are still unable to have access to your premium please email email@example.com.