Flipkart — I'm complaining about my refund money didn't reach at my account.

I'd purchased shoe from Flipkart of rs718 on 24 Aug, 2021, as the product was the same as it was shown on the image so I returned the product & was pickup on 6 th sept 2021, refund money was supposed to get on 8th sept 2021 but the given was delaying so I'd contact the customer service & they said payment was made successfully but I didn't get the refund amount. I've update my account multiple times but amount didn't add to my account.
Flipkart customer service has already closed my issues but I want my refund money back.