Hi my name is ***** ***** I can assist. If you haven't signed up for Pandora One which is the pay service, you'll need to contact their customer support page and on the form mention that you did not sign up for the service. They'll be able to investigate any fraud that has occurred and refund the charges.
If I was able to lead you to the correct resolution, please rate my service below. Otherwise, I'm willing to continue to work with you until you're satisfied.