My Inbox is saying I have 4000 unread emails which is not the case how can I correct that
79th
ranked

I have a couple of troubleshooting steps for you that should resolve this issue:
1. If you’re signed in, tap the Settings icon, tap Manage Accounts, then tap Edit, tap Remove
2. Restart your mobile device
3. Uninstall and reinstall the app with the latest version
4. Lastly, switch the internet connection from WiFi to mobile data