Amazon India — auto cancelled order (purchased with offer) without prior notice

Address:	411033
Website:	www.amazon.in

Hi team,
I am prime member of amazon india, i had ordered one mobile, with independence day offer (10% instant discount). I paid the money in advance.
They shipped the order and cancelled the order after shipping without prior notice. Also they haven't gave me instant refund yet. I called up them and they were asking me to re order same product again. (But they are refusing me my money back instantly and to give same offer for next purchase). And i didn't had that much of money to order the same product again.
My concern is if they have any issue with the product, they could have send another product with the same order.
They misused my money, prime membership and fooled my by showing wrong offers