Amazon India — No Refund of same day delivery charges

I have order Haier washing machine on 26th July and paid 50rs extra as part of same day delivery to get it delivered on 27th July. In Amazon app it’s showing delivered but it was not delivered and I got the product on 28th July. I have contacted customer support team
Dimple from there confirmed that once you get the product delivered than we will refund the 50rs amount. But now after 5days also they are not returning the amount.
It’s a fake charges case against Amazon. It should be taken seriously and a strict action is needed.

Attaching the chat image also.