India Post — Not receiving normal post

Address: 110092

We are not receiving 90% of the normal post (including journals) since last 6-8 months. It seems that Post Office has handed over the delivery task on contract basis or to contractual employee, who even not ready to meet us personally for the issue. He simply throws the post without getting down from his cycle. We requested him to deliver the post at our office but he simply said that he is going to deliver like this only because he has to distribute all post in 1 hour only.