Myntra.com — refund issues, carelessness

I had purchased a pair of nike shoes worth 4095 which i retured soon aftr 8 days due to size issue, the product was picked up and i was waiting for the refund as they mentioned i had to wait for 7 working days, i get a message saying the refund is initiated to my source account, checked but the amount wasn't reflecting, spoke to the myntra customer care and the adviced to get in touch with the bank. Personally visited the bank and the manager said its not transfered to the account. Again called up myntra ans the gave me a reference number but still the bank couldn't help me with it. Requesting myntra to help me out instead of me troubling myself for my own money