Myntra.com — Till myntra did not have my refund

Sir
I had purchased one items from myntra on 5th oct, & that item returned by me for which I should have receive the return refund of rs 1236 but till date 15/11/21 myntra has not refunded me the above amount. I have confirmed from my bank that they have also not received any amount on behalf of me. I have contacted myntra for several times through mail and over phone but there is no response from them.
Hence requesting you please look into the matter and help me out.