Flipkart - Cancelled my project

I recently ordered a product from Flipkart which was on deal in **th Sept, I actual price of the products were somewhere around ****-**** but in deal I got the products at ** each, so i quickly ordered them. After ordering the product I sat back & waited for the delivery of the products which was given as **th September. And in the day of delivery only I received a message from Flipkart saying that all of my four products have been cancelled as the product went out of stock. I mean seriously, is it some kind of joke or what. How can you cancel someone's product stating that the product has went out of stock. If this was the issue then they could have not let me allow to order the products in the beginning itself. They've wasted my time & also money as I ordered the products in a very good deal. Now I know the real reason why they cancelled my product. It's because the product I had ordered were in very good deal or maybe some price error on the product. If this is the case then I'm gonna file a case consumer forum as well.