India Post — parcel stuck in mumbai airport

Hello sir

I have bought an item from united states. It was shipped from los angeles on 1st august 2020 vis usps. The product has reached chhatrapati shivaji, mumbai, india on 5 august 2020. It is to be delivered to delhi.
It took only 5 days to reach india. Why is it taking so long for it to reach delhi from mumbai???
Please help me get my parcel as soon as possible since it consists of essential items.
Tracking no : uh[protected]us