Capital One Shopping (Formerly WIKISHOP They promote a discount aid, a Chrome extension, to pop up when shopping, with coupons, but stole $39.13 from my Visa card Internet

I added the extension then went on Amazon's website to shop. A pop-up appears , saying I was such a good Amazon customer, I could pick a free prize if I answered a few survey questions, which I did. I was then shown a bunch of skin care products and a MP3 music player as my free gift. I chose the free MP3 player, then was shown a screen to enter my credit card information--which I know Amazon already has--so I could pay $2.00 to cover the shipping charge. I received NO email confirmation the gift or the $2 shipping charge. Then, checking my credit card bank website, I see a brand new charge for $39.13 from an unknown initialed company. The bank listing gave a phone number which I called, and the phone operator would not give me any straight answers except to say I had purchased a skin care subscription and would receive products sent to my home. I said I had OK'd a 2 dollar shipping charge for MP3 player, and she acted like I was crazy--BUT--she promised to send me a refund by canceling the Visa charge when I told her my bank would block your company from future scams.