India Post — Even after a month I didn't received my courier

Please look into the tracking ID code send by USPS (American Post)- UM[protected]US.

On 26th Aug 2021, I placed my order.

It came to India on 1st September 2021, in INDIRA GANDHI INTL airport, Delhi.

Since then it is showing my parcel is in Transit.

I contacted USPS... and they told me it is with Indian customs as per their tracking.

I have no idea whom or where to contact for my parcel. The tracking code is not working with India Post.

The book was very important for me.

I am attaching my invoice as well as the last tracking I have received from USPS. (Initially it was shipped by UPS, but USPS finally sent it to India)

It's my humble request... please help me to receive my courier.