Amazon.in — refund not received against my return

Website:

www.amazon.in

On 04 nov 2018 i ordered two sarees from amazon.in and my order number #[protected] and my purchase transaction reference number was[protected]
But due to defect. I had return it on 07 nov 2018 they processed the refund of 541 rs which is partially done in my amazon pay balance as 251 rs and sent email about 290 rs refund with transaction reference number.[protected]Which is as same as my actual purchase transaction number. Please take note it because two transaction numbers could not be the same)
But the amount doesn't credit in my account and bank customer care and branch say they can't help me with this reference number. And can't file charge dispute as they can only file if the amount is debited from my account or the transaction is failed now amazon india still not helping me regarding this issue kindly help me.