Why won't itunes download this song?

So I bought a song on itunes using my iphone but every time its almost completely downloaded the song restarts the download again and again until I get an error message. I tried downloading another song and that one worked fine, but when I tried to download the first song again it still woudnt work.y Wi-Fi is at full bars so thats not an issue either. Any ideas on how to fix this?

I had the same problem! What i had to do was connect my iPod to my computer and download it that was instead. Hope this helped