My iPhone won't let me listen to a song I just bought

So I bought a song about an hour ago, and it downloaded and let me listen to it. I went off Wi-Fi because I went somewhere and it had a circle icon like it was still downloading and I tapped to listen to the song and now it won't let me listen to it. When I tap it, it skips to the next song. And I can't delete it to re-download it. But it lets me delete all the others. Why isn't it letting me listen to it! I don't want to buy the same song with a different album and have it not work either:\.

Try hooking it up to a computer.