Amazon India — refund amount to reflected in account

Address:	Thane, Maharashtra, 421201
Website:	www.amazon.in

I am writing this mail regarding refund for oneplus 5 (Slate gray 6gb ram + 64gb memory), which i was purshased on 18th sept 2017, order #[protected],
I had cancelled the order that i placed on amazon and awaiting a refund of 29774. They had initiated it on 29th sept 2017, however i have still not received. They gave me a reference number to raise a query with the bank and they informed that the reference number is invalid and asked me to provide a utr no., the amazon failed to provide that number or any details or payment mode like neft, upi or imps and asking me to charge dispute however the bank refuses stating the charge dispute is done only for a failed transaction and not when a refund is expected.
I have been pushed back on both sides who give opposite answers. I tried to conference both bank and the amazon however the amazon representative said this is enough details but bank is unable to locate the refund with the reference number