How do I cancel a purchase on iTunes?

How do I cancel a purchase on iTunes. I wanted to purchase a song but it was only once I'd pressed download that I realised it was a ringtone and not the song version I wanted...
I have paused the download in it's tracks, but what I want to know is how I CANCEL THE DOWNLOAD ENTIRELY and completely REMOVE IT FROM THE DOWNLOADS QUEUE.
Thanks in advance :)


You cannot.
Let it download, then delete it from your computer if you wish