India Post — Parcel delivered to wrong person

Address:	700137
Website:	Indianpost.go.in

I purchased a product from amazon.com, amazon seller sent the product through indiapost. The tracking number. Er[protected]in, the product shifted date 17th april 2017, and it was showing delivered on 19th april 2017. But i didn't received any parcel from india post. I contacted my nearest post office, they are saying it was delivered but they are not showing me any delivery proof.