India Post — Ordinary International Post

I have sent many international ordinary posts with the stamp of Rabindranath Tagore ₹50 but only 1 post has delivered till now. I can't track the posts as it was not a speed post, I just want to know what's the use of ordinary post when it is not delivered. It has been 45 days, at GPO Abids, Hyderabad they said it will take 25 to 30 days, I am very disappointed with the service, at least I hope it will reach sponer or later. As I have sent them for Christmas and New Year.