Xiaomi India — hopeless service stolen my money

I ordered red note7s on 13 aug 2019 with an exchange option. The delivery agent rejected to take old device due to a small crack on the corner of the screen. Now it's been 15 days i havent received my refund, i requested them i am ready to pay the remaining amount to deliver the mobile with by taking full payment but mi india not accepted my request. I tried a lot of things i requested mi care about my refund he says it will take 8 to 10 days to refund the amount back nd refund will be issued after returning the product back to the warehouse. It's already 12 days from the date the device is returned i haven't got my refund. Now order status displaying return rejected. What the # is the service. Stilling customers money. Fraud mi india.