Delhivery — Fraud Delhivery agent

I ordered an expensive prepaid item from a company...2-3 days later, I got a notification from the company that the item would be delivered that day.
Same day I got a message about the item and a delivery code from 'Delhivery'.

Around 3:00 pm, I got a call from the 'Delhivery' delivery agent, checking for my address and informing me that the delivery will be handed over in 2 hours.
5 minutes later, I got a message on my phone, that the item has been delivered.
It's been 3 days now, and I have not received my delivery.
I have tried several times to call on that Delivery agents number but there is no response.
Kindly resolve this case and I am also filing a complaint with the police.