Myntra.com — return my money back

Address: sector 45 gurgaon, 122003

Dear sir,
I ordered a shirt(492.45 Rupey)(ORDER NO:[protected]-8519803) on 11 September 2019.I bought a shirt from myntra but it was not good and different in color so i requested for return. It is almost take 15 days to pick-up. I got the message that refund has been initiated on their website. But still it has not come into my account. My bank is asking for sender details which myntra is not providing. Moreover the reference number given by myntra is same when i place the order. I am calling myntra and bank people daily. Myntra customer care is not helping . I tried contacting through app but they could not establish a conversation due to unavailability of agent. There is no option available to contact them.i am waiting for my money from last 35 days. Kindly refund my money back.