HDFC Bank — Refund is not reflected in account

I bought product from amazon but after two days I return it to amazon.AS amazon got this product they initiate refund amount of Rs.899, but It's going to be over more that month My amount is not reflected in my bank account .The Refund Reference Number for the transaction is[protected]. Please credit my amount asap. I already gave application in bank regarding this on 22 Nov 2021.