Indian Bank — refund not credited by amazon in indian bank

Address:

136, PALANIYAPPA NAGAR, 3rd STREET , N.K ROAD, Thanjavur, Tamil Nadu, 613006

As i purchase in amazon on august 3 2019. While paying with rupay card there was a error and there was an double deduction of amount 519rs two times. I called for amazon customer care for the same day. The told me refund is processed. As per bank policy the amount will be credited in your account within 3-5 working days. But i did not receive the amount again i called to amazon customer care they have told me that refund is success from our side and they provide a reference number[protected]. They ask me to contact the bank customer service. But i tried no proper response from the bank. Again i contact the amazon they told me to charge a complain charge dispute form. Please help me as soon as possible. Help me