Ecom Express — Product not received but claims to be delivered.

AwB [protected], My product was a Pre-Paid package from Allen Solly. Allen Solly used Ecom express to deliver the package. The delivery agent from Ecom Express called me saying that he is outside my house, when i went outside and saw there was noone there and within a minute or so i get a message saying that my product has been delivered. And when i tried contacting them using the pin it says incorrect pin, i contacted the higher authorities and no proper response from their side either. I asked for the delivery agents number and the branch contact number of chennai, they refused to give the details.This clearly shows that ecom express is clearly a scam and some sort of gambling is going on with the product of the customers. If my product doesn't get delivered, im planning to file a case against them.