App review is stuck

Hello

Recently I have updated In-app product in iTunes and submitted for review. It is almost a month now the status of the app is still under ’In Review’. 

I have requested to expedite the review process almost three times, the reply is always they need more time to review my app. 

Is this common or something wrong in the process because the first time when I submitted with in-app purchase it got reviewed within a day. 

Appreciate it if someone guides me on this!
resolved or not?
App review is stuck
 
 
Q