skindiet.net Survey scam Internet

I got this survey request on yahoo.com and one of the "prizes" you could choose was Green Coffee Supplement from skindiet.com normally $89.98 but as a reward all I had to pay was the shipping for $2.98.  What they never mention anywhere is that they put you on an automatic renewal where they charge you the full $89.98.  Even if you do call and try to cancel before they ship out this second order it's too late, somehow they have already shipped it and charged your card.  When you call to return the product for a refund, they won't let you return it, because they have already charged you and they don't give refunds.  They will generously lower future shipments to $29.99.  I eventually got them to agree to never ship anything to me again.  However, I'm out of luck about returning this unwanted product.