First Flight Couriers — Envelope not received yet since last 6 days

Address:	400063
Website:	www.firstflight.net

I have dispatched one envelope on dated 12.11.2016 whose consignment number is p991b0449722, till now it was not delivered, latest update on tracking on website was that the door was locked, which was not true
Total 3 nos of mobile number mentioned in envelope one of sender and two of receiver, courier person not called in any mobile number,
As as back up plan i already inform to security guard of the building to collect the same after my confirmation, that also not done.
Is this quality of facility i am expecting with this nationalized courier.
My document is lost, take strict action against them. Really disgusting.
It was better that if i send the same with speed post facility of postal department which will perform better and charge less.