Amazon India — Refund worth INR 3801 not credited since 1 month

Placed 2 orders in May - 1 for INR 3499, and another for INR 302.
Both orders were not delivered with the reason customer rejected delivery - but no call was made to my phone for delivery.
Products have now reached back to Amazon, and they keep on saying that refund will be processed in 2-4 business days - but it has been one month.

Last customer service agent I spoke with asked to wait while she checked, but then hanged up.