Myntra.com — Refund not processed for t shirt

Bought a Tommy Hilfiger in early november 2022
Men Blue & Red Printed Pure Cotton T-shirt
order number
[protected]-2442703.

Size and fit was not to my liking and they did not have a larger size at that time. hence, decided to return, which was picked up promptly.

however, the problem was the refund. gave my bank details via their website support and called their customer support at least 5 to 6 times: same monolog- we will update via the website, please let us assist.
despite my refund not settled, they keep closing my issue. and even their supervisor are not very helpful- same answers as the junior personnel