Flipkart — Mobile order on exchange

I ordered mobile with exchange of old phone discounting me 1000 rupees. Delivery agent called me to come to his office for exchange and to collect new mobile. I asked him that i paid 100 rupees for exchange pick up so come to my home. He threatened me that if i will not come to his office in 10 min he will cancel my order. I purchased it on sale so reached to his office where he misbehaved with my younger brother as i was out of town. He denied to take my exchange mobile and my brother waited for 3 hour in his office. Then i asked my brother to come back to home and i complain his misbehaviour in flipcart customer care. Then he calld me in evening and asking me to come to his office with money then only he will give me my parcel otherwise he is cancelling it. And when i requested he asked his mate in background that cancel his order with abusive language. It was my worst experience of my life. Flipkart not even supported and asking 4 days to solve this issue. Worst app ever. Once i clear with my order i will never ever order anything from Flipkart. I really felt like abused after this incident.