Myntra.com — problem with refund

Address: J-203, Dynasty society, Vishnu Dev nagar, Wakad, Pune, Maharashtra, 411057

Website: Myntra

I have put the return request for two items on 6th august.
1. Hrx by hrithik roshan blue solid non-wired lightly padded sports bra hrx-aw18-wk-3356. — which was to be picked up by "xpress bees". Rid: [protected]
2. 2go women black tights — which was to be picked up by "myntra logistics".
Rid: [protected]

Both the return was picked up on 8th august by the boy from "myntra logistics", when i asked for return acknowledgement slip, he denied me giving that.
I got the message acknowledgement of return item and refund for rid: [protected], but for the first item didnt recieved it til date.
Have raised a call 4 times with myntra customer service, but they have denied my return refund.

Attaching the message screenshot.