Campaigner Billed me monthly even though I did not use their service, would not refund my money  Internet

Just had a horrible experience with the e-mail marketing company Campaigner. I wanted only to take a quick look at their templates. They insist that you give them your credit card information before you can do this. I never used their services but they billed me for months. I asked, but they refused, to refund my money. They are the only e-mail marketing company that I am aware of who requires a credit card number to investigate their services. After searching the web, I have found that many, many people have had this experience. They are total crooks!