Amazon India — Moto g turbo - cancelled order by amazon without my consent

Address:	380051
Website:	www.amazon.in

I have placed the order of Mobile phone (Moto g Turbo 16 gb -White) from amazon india, its actual price on amazon is 12499.I got promo code from baniyadeas.com and said by applying this promo code you will get a discount of 7499 and pay 4999 for the mobile.I tried to placed order for Black color but its showing that promotional code applicable with white color only so I have place order for white color mobile.
I logged in my amazon account, applied the promo code and it worked then i made the COD and placed the order. Order No.#[protected] .I have received the order confirmation email from amazon after placing the order and around evening I got message from amazon that order has been cancelled.My complaint is how amazon can cancel the order automatically after confirming the order and without the concern of customer they are cancelling the orders placed. Amazon.in has make the people fool.Amazon.in has to supply the product to me without any argument.