Canara Bank — myntra refund not processed

Address:

11, Sagar Housing Complex, Anoopsher road, Aligarh, Aligarh, Uttar Pradesh, 202001

I had paced an order on myntra on 22 june 2019 of three items worth rs. 1728 i returned a product worth rs. 517 the refund from myntra got initiated on 28th june of the same amount rs. 517 but till date it has not been credited into my account. I contacted myntra customer care thrice they assured me every time that refund has been processed by them and i need to contact my bank. I contacted canara bank customer care thrice, they just kept on telling me to wait, it has been one month and the amount has not been credited into my account by canara bank. On contacting canara bank branch office, they told they don't know anything it. Please look into the matter and necessary action. I am providing my details below:
Account no:[protected]
Card no: [protected]
Myntra complaint reference no:[protected]