Myntra.com — the order is cancelled without my knowledge

Hi,

I have ordered a flip flop on the sale day of Myntra EORS, The order was been two weeks with them, on July 4th they have cancelled it without my knowledge. Now they provide me 40% off on order 1000. But I brought that product for 566, Now the actual price of the product is 1499, if I spend 40% now it's around 890 exclusive of GST. As a consumer based company the quality of supply chain and technology should be good, as a valued customer they shouldn't do this to me. They had my money for 2weeks without any reason, I need to get this addressed.

Thanks