Ecom Express — I am complaining about fake delivery

Address:

Morbi, Gujarat, 363642

Hello
As i order a parcel from club factory.
They send it by ecom express courier.
Before delivery
The courier boy called and says that the parcel was empty.
Nothing in the bag.
So i asked him that why you opened my parcel. He says that he didn't open but it looks like empty.
So i said him that you just deliever my parcel to me. And he says tomorrow morning.
Next day no one is call me.
So i called ecom express office in my area.
They said me that the parcel was locked. And returned.
And suddenly after 30 min. Of that conversation i received a delivered message from courier company.
But the parcel was not arrived.
Now they are not responding to me.
What can i do?
Please help