Limeroad — Incomplete delivery of order

This is in reference to order no [protected]. i had ordered mutaqinoti shoes in buy 2 get 1 offer. I received the courier on 26th april . On unpacking, only two boxed had shoes while the third box was empty which seems like a case of cheating or fraud. I have mailed the company regarding this issue but there is no other way to connect to them or register our complaint other than email which also takes 48 hours to get a reply from limeroad. Please help me reach out to them and resolve my issue asap.