Amazon India — Cancel and Refund request on order #[protected]

I have placed an order for Dumbbells on June 23rd 2023 and paid the complete amount via UPI (prepaid order).
I have cancelled the order since I no longer needed it.
Order status changed to waiting for approval from seller for refund.
I called Customer Service on June 30th and I was told to wait for 24 hrs more for the approval.
Then the next day I could see refund was approved by seller.
As i had not received any refund even after 2 days, I called CS again on July 3rd and I was told by one of the CS guy that your order is not cancelled (even though the refund was approved by seller), although I could see only 'Return or replace items' on amazon app. He then told he will place cancel request for me.
After few minutes I could see that the status is changed back to delivery.
I called the CS and I'm being telling now that this I have to self ship the product to seller by myself and I will get refund only when the product is delivered to seller.
Fact is I have already paid the huge amount during the order 31707 and I have not even received the product.
I want amazon to do the return and give a refund of complete amount 31707 ASAP.
I dont want to self ship the product by myself and I dont want take any chance with my huge amount. That is why I choose to order from Amazon.
Please do the needful - Cancel my order and do Refund of 31707 ASAP.