Download with wifi

[cwinchester]

Hi guys! So yesterday my provider gave me 24 hours of unlimited data. I had to leave and decided to download some music on Spotify with my (unlimited) data and switched it on to do so. After I downloaded the playlist I wanted to, I switched it off again. Now everytime I try to download something it says I have to switch on the download with data button even though I'm connected to the wifi constantly. Someone who knows how I can download with just wifi like I always did before? Thanks!