Same MO.  Didn't catch on at first, but when I realized the charge was to some company other than microsoft (which is who they said they were calling from at first) I cancelled the charge with my cc co and unplugged my computer.  At substantial expense I then had everything taken off my computer and reinstalled.  Don't fall for their line.  Thie phone number does not ring.  It automatically disconnects and you get the recorded message phone co message "If you want to make a call,,,,,".