India Post — no updates in a parcel

Address: New Delhi, Delhi, 110049

Website: www.indiapost.gov.in

Hello,
I was sent an article from singapore by someone on 18/7/2017 with the tracking code rc[protected]sg.
When i track the item it only shows update till 20/7/17 and says the next location is kolkata post office and after that there is absolutely no updates.
I tried contacting my local post office and they say they haven't received the parcel and when i call the kolkata post office no one picks up the phone.
I tried all of the emails that i found online but no one of it is working.

Please kindly help

Thank you.