My computer switched off before downloading a song from itunes?

[AmberAlaym]

Now,when i logged in it said i had $2.59 which was enough for a music video i wanted to buy.I tried to buy it and it asked me for ym password. As soon as i typed in the password and clicked 'Ok' it went down to 90 cents.. My mum said then that, she bought a song and it was downloading.But the computer switched off before it could fully download. Now we lost money AND dont have the song my mum tried to download... what to do?
My mum said an old elvis presly song

 

[temp]

Find the Itunes customer support number and call them up.