Amazon India — not responding on my complaint and unable to give me refund

This is my first experience with amazon but unfortunately. Have
Ordered at amazon india order #[protected] which you have
Delivered to me is defective piece i am highly disappointed, and
Never expected amazon will deliver such
Defective product. So i sent to return this item on dtdc
(D[protected] item you return reached the distinction. But receiver
Refuse delivery show in tracking) and mailed to customer care
They are not responding on my complaint and unable to give me
Refund.. Even i contact the customer care 10 times. But no positive
Response from them. So, i really unhoped. So please solve this problem
So that i may be continues with you. Tq