Well today they said Shipment landed in courier mode and asked me to share another declaration letter addressing to Deputy Commissioner of Customs, NCT, New Delhi, requesting customs for clearance and also asked to state end use, purpose of import of the imported article, (will update as it goes )
Well have you asked them why it cannot be imported in courier mode??
as per cbec" Packages upto 70 Kgs. of weight can be imported to India through courier mode. However, there is no such weight limit for export of goods through courier from India."
Also "Commercial goods which are dutiable can also be imported through the courier without any restriction of quantity subject to payment of duty by the courier company at the time of clearance of the said goods from the Customs. "
source:
http://www.cbec.gov.in/htdocs-cbec/js-menu/import-courier