Myntra.com — I returned the product within 7 days but they didn't give me refund

Address:

New Delhi, Delhi, 110046

I contacted them many a time but they give me some fake reference number and told me to contact bank but when i approached to the bank they said no amount came from myntra. Further i contacted myntra they are just giving me fake reference number.
I even send them mail with my bank statement as a attachment. But there is no response coming from them.
They are just frustating me by saying to contact bank and gpay.
I did all but my money is not refunded back.