India Post — My admit card not dispatched at home.

Address:

Nainital, Uttarakhand, 263139

Dear sir,
I am requesting to postman who is dispatching later on door delivery, please do his work properly.
As per the one incident, i hv nt received my admit card. When my friend was in post office for his work, he got my admit card at that time examination has been completed. I was left my exam.
Please let me know who is fixing the problem and why i am suffering.