Amazon India — refund still not credited since last 2 months

Address:

Parvati Raj Park, FlatNo. 6, Keshawnagar, chinchwad, pune 33, Pune, Maharashtra, 411033

I had ordered a Caprese Purse, 2 pairs of footwear and 2 clothing stuff I.e. a Vaamsi kurti and a Rare Top in the month of August 19.
I was supposed to get all my refund by 1st week of September but till today I haven't received it.
I had paid the amount through Phonepe i.e UPI ID.
My bank ia SBI.
I have tried to contact Amazon customer care but they did not helped me in expected manner.
The amount was near ₹3000/- which is quite a huge amount for a common man.
This kind of fraudulent behavior is unexpected and it's the worst ever experience with Amazon.
Other apps like flipkart and myntra make the refund immediately. But Amazon seems to be hopeless and helpless