Stop sharing information regarding your credit card from any unsecured site. Keep on talking to the customer care people regarding your card and also go through your itemized credit card statement carefully. Don't give the photocopy of front and back to any one as it contains vital information.
CVV no printed on the card is very important.If the card number,CVV, name on card and expiry date is known to someone, he/she can make online purchases without having physical possession of your card.