Myntra.com — I am complaining about receiving partial order.

I have received partial order from myntra (Out of 7items i have recieved 4 items) and i have been complaining about the same for the last one and a half month. Earlier the customer care services told that we will get refund as the refund is initiated but now we are getting informed that they did send all the items and they can't provide us with the refund.