Amazon India — product marked as delivered, doesn't get delivered

Address:

New Delhi, Delhi, 110018

Knk-mpl, a seller for amazon.in takes the order and then says the order will reach in 10-15 days. And as the 10-15 days mark is about to reach, the status says "delivered" but the product doesn't get delivered.
After talking to customer care, they all say that the product "was delivered for different pincode". How the hell does that happen?

After having such a situation, i checked the seller's review and there are lots and lots of people saying same thing about the seller. Still company like amazon has kept the seller and haven't banned it or removed it.

This is really frustrating, as this is just one seller i have raised complaint again, but i had issue with another seller too from amazon.
Amazon should take this really seriously, because their brand will surely get a hit because of such sellers.