Flipkart.com - Order Cancelled due to mistake of the seller

i had ordered this water purifier with cash on delivery option for the amount of rs. *** with discount of **%.
i was able to see the delivery date and time as **th march, * pm to * pm.
yesterday, i saw that my order was cancelled, i did check with my family if they mistakenly cancelled the order but found that they haven’t.
then i called the flipkart toll free number about the order and have been told that the seller had cancelled my order because it was a mistake by seller to provide the discount.
i was waiting for my order to receive and they just cancelled my order and didn’t even notified me.
i have the question for the flipkart, how can you make your consumers suffer for the mistakes of your sellers?
i want flipkart to stand with me (the consumer) and ask the seller to deliver the product which they have cancelled on the same rate they had given in the flipkart application (Rs. ***)