India Post — Non delivery of letters

Address:	Bangalore, Karnataka, 560070
Website:	I am only complaining about the non delivery of letters

I have posted marriage invitations of my son to addressees in Bangalore City and other states thru Bangalore City 3rd block, jayanagar post offices .several of the invitations have not reached the addressees, which I came to know after I called them over phone.i was told by Bangalore City jayanagar 3rd block asst.post master mrs Bagyalakshmi, that all the letters have been cleared by the post office, jayanagar 3rd post office and that I have to check with RPO.pl.let me know how to ensure the invitations will be delivered ?pl.advice status o[censored]ndelivered letters and oblige.uma maheshwar