Myntra DANIEL KLEIN - Received an empty package

I have received an empty box from daniel klein myntra on **th August from the seller designer progressive india llp.I had ordered the daniel klein analogue watch, however, my parcel only contained box from daniel klein without the watch. I did file a complaint on myntra ,however they have declined my complaint stating that the they have already the package. So please help me getting either my watch or a refund.