India Post — Registered air mail not delivered for long time.

Address: 700102

Website: www.indiapost.gov.in

My letter was booked from hongkong on 20.5.2017 but till date not delivered. my docket number is rc[protected]hk it is showing as kolkata foreign lcao office on 24.06.2017. it should come within 15-20 days. it is already 47 days passed. tracking it seems like it never reached the post office. kindly look into the matter and do the needful. very very important documents are there. please treat the matter as most urgent.