India Post — I am complaining about the non delivery of parcels

Address:

110024

We are a online chemist shop by the name mchemist.com situated in lajpat nagar new delhi.We are a registered dealer with india post we regularly send aryuvedic medicines and prescription medicenes to different places all over india through india post. There are no of parcels which are not dilivered and returned back with a note wrong pin code, some times it says wrong address, where as the pin codes and adresses are correct. Also most of the parcels which are dilivered takes long time for dilivery which is causing problem for our customers most of the customers are patients.This shows the incompetience of postal staff. I am attching the photos herewith for your reference.