********** "winnings" from Nu Metro - nu metro stole my credit card details

Hi was informed on Nu Metro Cape Town facebook page that I was one of the winners of the IT movie movie gift cards. I received an inbox from them confirming that I won, and that I have to click on the nu metro link to claim my gift card - it took me to the site and it needed my credit card details "to issue the card". Now I have been charged with all sorts of amounts on my account and had to cancel both my cards. WHAT THE HELL???!!!