Myntra.com — Products Ordered cancellation by the Myntra automatically without my permission

I am the customer of Myntra who felt lot of inconvenience with Myntra service in December. As I got the cancellation message about Ordered products two times consecutively. I ordered for the occasion and also at the time of better offers. But now the offers got ended and cost of products I wanted are up now. I needed the products for the occasion. The first time I ordered (on dec 16) the two products of HRX- Jacket and HRX-Sandals. And second time after receiving automatic cancellation message from Myntra I ordered second time for other products. The second time I ordered (on dec 21) HRX- sandals and Roadster- jacket . But no satisfaction of shopping because I recieved same cancellation of products from Myntra. And the automatic cancellation message saying that the cancellation done due to unexpected internal problem. This depicts unclear solution and reason for the products cancellation. What is the solution for this?
NOTE: And atlast I want to say something that crediting Myntra cash doesn't balance the inconvenience faced by the customer.