Amazon India — refund not reflected in bank account

Address:

Jaipur, Rajasthan, 302020

I had returned 'eureka forbes super clean' costing rs 2499
But as per amazon they have refunded the amount in bank account on 24.01.2019 under rrn no.[protected] which is not reflected/credited in my bank account.
Repeatedly called to amazon customer care provided me with same answer that refund has been done check with your bank. And while checking with bank they says that they have not received any refund related to it.
Kindly help me and provide me ways to get my refund.

Regards,
Ankit jain
Mobile no [protected]
Email id - [protected]@gmail.com