Follow these simple steps to expedite a review in App Store:
1. Login with itunes connect. Then click on “Contact us.”
2. Now choose the option “App review” from drop down menu.
3. Choose the option “Request Expedited review” from the next drop down menu.
4. Now click on “Request an Expedited App Review” that is highlighted
5. Fill in all the required details
6. Do not forget to fill in the reason for the expedited review and all the descriptions. It’s mandatory! For example- If you want to expedite a review for a minor bug fix, you have to fill in all the details of reproducing the bug and also mention a valid reason for fixing.
7. Once you are done with the above mentioned steps, just submit your form.