Ajio — refund amount is not yet credited

I have placed an order with ajio on 31/08/2020 (Order id #fl[protected]) and i have cancelled part of my order on 13/09/2020. But i have not yet received the refund amount. They have confirmed that the refund amount will be credited to my account by 21/09/2020. But i could not able to track the amount also. I have raised complaints multiple times and contacted with their customer care service also. But my issue not yet rectified