Myntra.com — not getting refund which i paid twice during the cod payment. please help me.

Address: AKR Tech Park - B Block, 7th Mile, Off, Hosur Rd, Kudlu Gate, Krishna Reddy Industrial Area, Garebhavipalya, Singasandra, Bengaluru, Karnataka 560068, 560068

I ordered hrx-joggers online through myntra.com application on date 22/12/2019. It was a cash on delivery order. I received the same item on date 26/12/2019. First i paid the amount 516 through phone pe tranx. Id was upi/[protected]/p2m/[protected]@ybl/myntra. My amount got deducted. But the delivery boy made me to pay twice for the same order. I said payment was unsuccessful. I had to pay to second time by swipe machine tranx id was pos[protected] msw*instakart services. He said if you paid twice your extra amount will be refunded. I made online complaint to myntra.com. They told me the will validate all the details and they will provide me update by 31st december 2019 but on 31st they called me and told you need to wait for more 48 hours. After 48 hours i didnot get any call from their side. So i called them today. They are telling you need to wait for more 24 hours. And then they will provide me an update. They are continuously making me fool. They are not providing me my refund. Please help me. I am hopeless.