Flipkart - Delivery agent misbehave and package not delivered

I have placed an Order ID - OD****************** of
FashMade Solid Sports/Regular Cap on **/**/** wednesday which was a prepaid order and the product was schedule to deliver on **/**/**. But on **/**/** i got call from delivery agent which is a small miss call, i called back and he didn't received it i tried * more times * rd time he answered the call and i asked why he is not answering the call so he start talking rudely and turn abusive to me i ask for the package and he disconnects the i tried few more times but he didn't answer it while i was trying i received a message that product is delivered which i haven't got yet i raised a complain to flipkart they assure that the product will be delivered by * pm that day, but i didn't got it and i am trying to raise complain and check with them daily till today i.e. **/*/**. Now i received the call from flipkart in which they say we have words with the courier company and they confirmed the product was delivered to you on **/*/** and they can't help me further. I told them it was a prepaid order and i didn't share any OTP with delivery agent how it will ve delivered to which they answered that for some product OTP is not REQUIRED. I am very upset with this attitude of flipkart and i seek help nd justice.