Complaint Review: Nationwide Voice Messaging

My 12 year old son wanted to download some music to his mp3 player. He looked up Free MP3 Downloads, clicked on this one, 101 free. He had me look at it and nowhere did it ever say he was signing up for ANYTHING. Then we get the email that congratulates him on his 800 voice messaging he signed up for, telling us 15.74 will be billed to the first phone bill, then 13.22 a month after that. Can cancel at any time, but there is no number, nothing, anywhere to cancel. This is so wrong...I am writing to them since I only have an address, but this could take months.

Shari
Tipton, Missouri
U.S.A.