AuraVie Unauthorized charge against my bank card Encino California

I was offered to do an online survey.  In return I would receive free products and a gift card.  The survey took over an hour.  When three quarters of the way through the survey, I received a "congratulations you have receieved free skin scare products for just 4.95 shipping and handleing".  If I wanted alls I had to do was check the box stating so and pay the 4.95.  I did so.  I then continued on with the survey.   The company just charged my bank account 97.88 for the free sample.  I never saw the words Trial period.  There clause was hidden somewhere.  I never saw the clause.  So I did not get the sample for free.  I had to cancle my bank card.  They will refund me the overdraft charge, but not for the product.  This is a very under handed way to make a sale.