Tata Cliq — Cancellation of order on their own

I ordered a bag on Tata cliq 's black friday sale .The price was 50%off .they automatically cancelled the order 5 days after placing the order on the website saying it is out of stock but it is still on the website and is in stock .But now the price has become double of what I bought .They waited for 5 days to cancel the order after the sale ended .
And didn't even have the decency to inform before hand .They could have atleast cancelled DURING the sale so that I could buy from some other place .

And now when I checked the website, they have item on store and the price have increased by Rs. ***/- and the new price is Rs. ***/-.