India Post — Delay and deny in delivery

Address: Ernakulam, Kerala, 682304

I need to get one very important documents which is send through speed post bearing consignment no EL[protected]IN from Alappuzha on 22/03/2017 till now i didn't received the documents. I just called concerned post office [protected] they replayed me "if you need the documents need to collect from post office'' and cut off the phone what a pathetic service provided by the indian postel service