Myntra.com — product missing

Address:

Mumbai City, Maharashtra, 400067

I had ordered 1 nike flip flop and levi's trunk
And today i received my courier where i received levi's trunk and only one pair of slipper (Left leg) and other pair (Right leg) of slipper was missing.
But now i don't know what to do. How i should proceed for missing slipper.
My order no is:[protected]-8829601
Pocket no is :[protected]
Reference number:[protected]