Amazon India — didn't receive the order but i received an item delivery mail

Sir,
I ordered a puma men's court point vulc blue and red sneakers - 10 uk/india (44.5 eu), [order #[protected] ] on feb 3rd.
I was very disappointed when i received a mail on 10 feb, 2018, which read that my order was delivered. There was no phone call or message regarding the delivery of the package. Hence the order was not delivered to me.
I am looking forward to your response. Hope you would soon look into the case and deliver my ordered item else i would to look to a legal suit.
Thanking you.