Cannot download songs from Vox Cloud on IOS app


I downloaded the Vox ios app yesterday and paid for a a month of Vox Cloud. I uploaded some songs but when I tried to download a song on the ios app to play in offline mode, it didn’t show up in my download folder. The download items size displays 0 bytes. I’ve had this problem before which has led me to abandon Vox in the past. How do I fix this?