Indian Bank — refund amount not yet credited to my account

Address:

Alamelumangapuram,perumugai, Vellore, Tamil Nadu

As i ordered some products in amazon and cancelled. The refund was intiated from amazon side is on 30th may 2019
But the refund amount was not yet credited to my account. I still waiting for it. By calling the amazon they said that it was bank side mistake and they said to ask information from bank. But in bank the ask UTR number. I ask amazon of this but they denied by saying that they have no access of providing this. Please take action regarding of this and refund my amount as soon as possible