Amazon India — Refund or replacement not received

Address:

Velachery chennai

My order dated 24 October 2022 your ref ORDER #[protected]. I received the item by end October 2022.
The product is Bose Portable Smart Wireless Bluetooth Speaker with Alexa Voice Control Built-in, Wi-Fi Connectivity, 360° Sound, Powerful Bass (Black) costing Rs. 33065/-
I returned this item after talking to Amazon official. I was informed that it is okay for Amazon if I return the item and your person duly picked up the item.
I did not receive the refund nor any communication from Amazon about the refund.
I spoke to customer support number and they informed that my refund request has been rejected. No reason was given and for this he asked me to write to ‘[protected]@amazon.in’. I wrote to this email several times and there is no response.

When I go to my order page, the status is that the material is picked and that refund will be issued within 3-5 working days. It is now pending for more than nearly 50 days.