Myntra.com — Delayed order

I placed my order on 4th Dec and was expecting delivery by 18th Dec. It was shipped after 6 days of placing order and is stuck on shipped status since then. It is now showing order is delayed. It has already been 15 days since I placed my order. I used to get my order within 7days. 15 days are too much and still I don't know whether they will deliver it not. Plus there's no cancel option in it.