India Post — delay in delivery service

Address: Kolkata, West Bengal, 700063

Sir/madam,

My package with tracking number rf[protected]cn is facing too much of delay. There is no update from 25th august 2017. It is a very important item to reach to my address before on 5th september 2017. I don't know why it is on hold, especially being a low valued item of $5. Please help me to get it forwarded to delivery destination. Kindly expedite the delivery process.
I have even registered a complaint in 'indiapost.gov.in' with complaint no.[protected] but to no avail. This is my first time in complaintboard.in. Lets hope this makes a difference.

Thank you.
Souvik roy
Email id - [protected]@gmail.com