Decathlon — I did not receive my order yet it shows delivered

Address:

357, B4, Kendriya Vihar, 560064

Hello i had placed an order on 16th march 2020, i was suppose to receive it on 18th march 2020. I received a message from decathlon that the order has been delivered on 17th march 2020, when i did not receive my order at all.
I raised a complaint via mail and via call on the same day... The customer care executive who received my call suggest me to check my package with my neighbor or security guard... How ingenious of her. I really appreciated her level of commitment in solving my problem.
I told her i never received a call from the delivery boy who usually in other online delivery cases call before hand... And make sure they make the customer know where they have left the order... Be it will my neighbor or the security guard.
The customer care executive seemed to be amateur in handling a customer query.
I called the customer care again on the 18th march 2020 with the same lame suggestion.
Today is 20th march 2020... But still no sign of my order.
I highly request decathlon to look into the matter. My order went missing before it reached me... And it is showing delivered to add to my pain.