"Thank you for contacting App Store Review. I understand that you have been waiting for the completion of your app in review which sustained an extended review. Your app is now rejected for 2.3.1 performance.
I recommend that your first course of action be a message about your concerns in the Resolution Center. You would be in touch with the review team who is familiar with your app. You can reply in the Resolution Center when your app is in a rejected state.
If you believe the review does not accurately reflect your app and its compliance with the App Store Review Guidelines, you can request an appeal by completing the Submit a Rejection Appeal form.
After the App Review Board receives your request, they will investigate your appeal based on the details you provided. When they have reached a decision, the Board will notify you of the outcome.
It was a pleasure sharing this information with you and assisting you with this request.
Your case number is 101336077421.