Amazon India — order says delivered, but I haven't received it

Address:

560071

I had ordered 2 devices and i have received neither of the of items were actually delivered to me. I contacted customer service and they said it's delivered and they can't do anything, whereas i never received a call to confirm or anything before the delivery was made. I simply recieved a mail saying the order was delivered and that's it. Please help me as i spent a lot of money and i need it for my college.