Kolkata RPO — Minor passport pending at police department

It’s been one month since my application was submitted for issue of my new born passport. The application was under review with policy department of Kolkata RPO as the father of the child is holding Nepali passport and mother is having Indian passport. I ( mother) have visited RPO twice to follow up and no extra document was being asked except for a declaration signed by the father. But it’s been more than a month that the passport is still not issued.
I fail to understand the reason for delay inspite of everything been cleared. Please help me as I urgently need to travel with my new born.