Amazon India — Denying to deliver my product after applying huge coupon discount code which was even accepted by their system

Address:	Bangalore, Karnataka, 560055
Website:	www.amazon.in

I have ordered a mobile phone with order no. Order#[protected] from amazon on 27th may and my order is successfully placed and even my product is dispatched.
I got a email from their side on 28th may that they will not deliver my product because the coupon i used during purchase is not valid and accepted by the mistake.
First of all they publish coupons with third party vendor then gather traffic on their website and accepts orders then cancel the order by making excuse of system glitch.
I'm not only the single victim thousands of customers are also get frauded by same day and same deal.
I want you to help me to deliver my product at discounted price asap from amazon and get them a lesson to not spear fraud promotion activities in future.
Thanks
Here is my personal details
Name - hemant kumar sain
Email - [protected]@gmail.com
Mobile - [protected]