Amazon.in — Wrong promises

Address:	Jaipur, Rajasthan, 302019
Website:	www.amazon.in

I have ordered a Motorola moto g3 from amazon.in by applying a promotional code, it successfully created my order and confirmed me my order status.
But after some time the order was cancelled with prior notification and after having a tele calling with amazon customer care the gave me a reason that the promotional code was not valid.
As a customer i felt cheated because i was given a confirmation and then my order was cancelled.
So i demand a reimbursement in favor of this Or they deliver me the product as promised.
my Order Id is[protected]