Flipkart - Order cancelled while the product is still in stock

I have ordered the Asus Vivobook laptop ( firmament green) when it was showing the price of ***** on **-*-****. My order was confirmed by Flipkart and I paid the amount via credit card. Also, avail the exchange offer. But Flipkart cancelled my order without any prior notification. And the reason they told me is that the product is out of stock. However, As I checked on **-*-****, the product is still in stock. But now they have raised the price to *****. I talked to customer care as well but they are not able to resolve my problem. And they also agree that the product is still in stock. I have also attached doc.