E-Cigarette Survey Offer

After completing the Cox Communications Survey I opted for the E-Cigarette Starter Kit trial offer for $3.95.  Within two weeks they charged my credit card for $99.99 as they stated that was per their agreement.  I had specifically informed this company via phone as their e-mail stated that I did not want any additional product 10 days prior to the charge.  Fortunately I kept notes but I have had to cancel that credit card and after talking again to their Customer Service Department, they are not refunding $50.00 of the $99.99 charge.  Has any one else had similar problems with this company (http://ecigsbrand.com/)?  They have clearly violated the EFT Act and I am sure I am not the only victim.  As a Cox Communications supported/recommended vendor, I expected much more.