Amazon India - Amazon frauds

Amazon india or Amazon.in is becoming totally fraud now a days. There was an offer of flight booking to get *% cashback upto *** in my account i fulfilled every single t&c as it was mentioned but they didn't credited a single penny as cashback neither there Customer service is helpful. They keep on saying wait wait wait till the death but nothing happens.
Same happened with my brother also he booked ticket but didn't received any cashback so they are just ripping away customers money by giving lucrative offers showing it to attract customers and after that rob their money simple business. I urge everyone through this platform not to use amazon for flight booking book from direct flight website they give more affordable offers atleast they'll give you something on booking
Order id ***-*******-*******
Amazon pay order id - P**-*******-*******