Flashstar Commerce — Refund amount not processed.

I have ordered a mobile phone on Flipkart, But the order is not placed and amount is debited from bank account. I am not getting a refund for about 20 days, I have already talked to bank customer care where they told that they have not received any refund regarding Flipkart side. I have complained Flipkart many time but the issue is not resolved. Additional detail is given belove regarding order-
Order ID OD[protected]
Order date 28/07/2020