Flipkart - Non delivery of the product

I had placed an order of marq *** litre refrigerator on flipkart on **-**-**** and had made the payment of ₹**,*** which is after availing all the discounts available at the that time. The list price of the product was **,*** and by making the payment with axis bank debit cards i was asked to pay ₹**,***. After making the payment my order was placed and i received the product shipping and tracking details.
I had received a total discount of ₹ *,*** at the time of making the payment. Which now has been reduced to ₹ *,***.
The refrigerator was scheduled to be delivered on */**/**** and on **/**/**** i had received a notification saying that my product will be delivered tommorow ( as the product had received the nasik hub) . On */**/**** flipkart cancelled my order without asking for my approval and iniated the refund process. After contacting the customer service representative they said that the seller had cancelled the order and they cannot do anything about the issue. After several attempts for getting an answer they said that they had overbooked the product and they did not have any left in stock available so i asked them about the tracking details and they said that it was a technical error.

My Grievance is that flipkart has cancelled my order because they have given me extra discount i.e₹*,*** and at this moment they are able to sell the product by giving little to no discount. So they cancelled my order and favored the one who has paid them more for the product.

Assuming that i will be getting the delivery on */**/**** i got rid of my old refrigerator ,but flipkart has wrongfully cancelled my order.

I have been cheated on by flipkart as once the product was shipped and i had made the payment we had entered into a Contract . Flipkart cannot cancelled my order without asking for my approval.

I want my product at the agreed upon price or the difference between the cost of the refrigerator and the agreed contract price (i.e₹**,***-**,***=*,***)