Please try tapping the Restore Subscription button on the payment screen or in the app’s side menu. This should help fix the issue. Before that, we recommend checking if your subscription is active on your device using this link: https://subscriptions.instories.com/
If you can’t restore your in-app purchases in Instories, please try the following:
Make sure you’re signed in with the same Apple ID that you used for the initial subscription.
Log out and back into your Apple ID in your device settings, restart your device, and try restoring again.
Switch between mobile data and Wi-Fi, and make sure VPN is turned off.
Confirm that your in-app purchases are not hidden on any of your devices: https://support.apple.com/en-us/HT201322