Amazon India — No refund of online payment

Address:	Bangalore, Karnataka, 560055
Website:	Www.amazon.i

Amazon.in Order #[protected]
The payment for this order was debited in my account on 31-3-17
As per amazon the had some issues in the payment gateway so order got cancelled
But i didn't receive any credit in my account..
After repeated follow up with amazon they have stopped responding
My bank is saying they have not recieved any credit back
What do i do now?