JustFly.com Billed price greater than advertised flight price

Flight was advertised in large bold font as $589.  In small inconspicuous font (that I did not notice) on the confirmation page, the price increased to $735. I didn't notice this until I had checked out and received a confirmation email. They initially wanted a $75 fee to cancel but decreased to $25 after talking to a supervisor.

 The supervisor argued that I had agreed to the price on the confirmation page. I'm still contesting the cancellation fee.  This bait and switch was clearly done deliberately, and was not an error.  I selected the same flight a second time and the fee was agin increased (in small inconspicuous type) on the confirmation page.