Nykaa.com — product return but refund not received

Address:	New Delhi, Delhi, 110003
Website:	Nykaa

My order number is[protected], i returned the product on 21st june. I got a message that return pick up done successfully however until today 27th june i have to update on when will i get my refund. Neither i have got the same i checked my bank statement.
I sent numerous emails and always get an auto response will get back to u in 24hours but nobody called.
I even called thrice and their executives disconnects as they have no clue about my issue. And now i got so frustated, really feeling cheated and helpless. I wrote the whole issue on their fb page but as always no reply. Please somebody help...
Attached is the screenshot of acknowledgement receipt which prooves that i have returned their product.