Hmm, go
here, enter your e-mail address and see if it accepts it. Then they'll send you an e-mail with all details. Maybe someone used your e-mail address to sign up to it? Most sites have a confirmation cde you have to click though.
You can block e-mails from @piczo.com if you want, or check the bottom of the e-mails, theirs usually a 'stop recieving these e-mails' or 'unsubscribe' link you can click on.