Medlife - fraud medlife is not refunding my money

I Have Ordered A Medicine From Medlife With Order Id OR****KEC-***A With Payment By Amazon Pay Of ₹*** But When A Delivery Boy Came He Told The Product Is Cash On Delivery And I Was Shocked When I Saw In The Product That It Was Written Cod Of ₹***,That Was Different Amount And By The Way I Have Done Payment By Amazon Pay, And I Called Medlife And They Have Not Taken Any Action Regarding This Only They Always Tell To Wait For ** Hours I Have Waited For Nearly * Days But I Did Not Receive Any Product After Even * Days I Again Called Medlife They Told To Wait For Another *days,They Are Always Wasting Customer Time After * Days Delivery Boy Called Me They Are Returning The Product Because It Was Cod And They Are Demanding Payment But I Declined The Product Because I Have Paid By Amazon Pay So Why I Should Pay Again So They Returned The Product But Medlife Is Not Issuing My Refund.i again called on ** april to Medlife the customer support was misbehaving he told that he cant do anything Please Check The Issue So That Medlife Should Refund My Payment