Big Bazaar / Futurebazaar / Future Retail / Hometown — Regarding refund and poor customer service

I placed an order on big bazaar app in the 1st week of September, 2021. I paid the amount of Rs.3999 through online transaction.But my order was not delivered. Rather the CUSTOMER care later advised to collect it from the local store. But they said they are not responsible for any such online transactions.
Then I again talked to the care and kept following up but no one bothered.
They cancelled the on 15th sept and said it will take 7 days for the refund to be initiated. I called again on 17th and another representative put in a new cancellation request...And it kept going on for a month...Each time I approach to know about the status of my refund, there will be a new guy who put in a new cancellation complaint.
In the last month I have almost talked to 20 representatives but they were of no help.
I have not yet received my money.
And the app is a complete ###. Its still showing my order will be delivered by 8th sept, 2021 though it has been a month.
This is complete harassment by such a reputed company like bigbazaar.
I sent multiple emails..But they dont have the basic ethics to respond to the CUSTOMER.
Kindly look into this.
My order id:[protected]