Ekart Logistics — My order was rejected without my permission

Address:

Lakhisarai 81311

When my product went out for delivery...then delivery boy called me and I told him that- I'm not available on tha delivery address at that moment.please come tomorrow, I'll take the product. I said him clearly that I'll take the product tomorrow. Please don't reject it. But next day he didn't came for delivery, I've waited the whole day. And in the evening I received a message that order rejected.
I want to raise a complaint regarding that particular delivery boy. He didn't even called me next day and rejected my order with himself without any permission. That was a very important product for me . I've also complained about this in Flipkart.