Hi there! I’m sorry to hear the Sandbox app isn’t working for you despite having a paid subscription, especially after using it for so long. Let's see if we can sort this out together.

To start, could you tell me a bit more about what exactly isn’t working? For example:

- Are you having trouble logging in or accessing subscription-only features?
- Is the app crashing or freezing?
- Are you seeing any error messages?
- Did this issue start recently, or after an update?

Also, since you’re on an iPad with iOS 18.5, I’d like to check a few basics that often resolve such subscription access issues:

1. Check Apple ID subscription status:
- Go to Settings > Your Name > Subscriptions and verify the Sandbox subscription is active and linked to the correct Apple ID.

2. Force quit and reopen the app:
- Swipe up from the bottom of the screen and pause to see recent apps, then swipe the Sandbox app offscreen to close it. Open it again.

3. Restart your iPad:
- Sometimes a simple restart can clear temporary glitches.

4. Check for app updates:
- Open the App Store, tap your profile icon, and see if there’s an update available for Sandbox.

5. Sign out and back in:
- Within the Sandbox app or your account settings, try signing out and then signing back in to refresh your subscription access.

If these steps don’t help, let me know what you found out, and if you saw any specific error messages or behavior. That will help me guide you further.

Does this sound good to start?