Flipkart - Order cancelled by seller

I had to order Redmi Note * pro. It is sold only on flash sale once a week. I waited for one long week and then as it was a flash sale so I had to sit for ordering the product exactly by **:** so that I don't miss the sale. On spending so much time, I got the product added to my cart and paid ₹***** for it using my debit card. The money got debited from my account and the order was confirmed. Within seconds, the status of the order changed from order confirmed to order cancelled. On further enquiry, I came to know that the order was cancelled by the seller. All the time I spent waiting for the phone got wasted. My money wasn't refunded at the instant. Instead, they told me that I need to wait for * days until I get back my refund. This company wasted my time and got my money stuck.