Scoresense.com Charged me 29.95 per month for a credit monitoring service after offering me some credit scores for $1. Don't know how they got to my credit card Dallas Texas

I THINK A FREE CREDIT REPORT OR REPORTS WERE OFFERED. I DID NOT NOTICE IT UNTIL PREPARING 2013 INC TAX THIS YEAR BUT THIS COMPANY HAS BEEN CHARGING ME $29.95 A MONTH FOR THE LAST 12 MONTHS (SOME MONTHS TWICE) 9ON MY CREDIT CARD) FOR SOME KIND OF CREDIT SCORE MONITORING SERVICE. I KNOW I DID NOT ORDER THIS SERVICE AND I AM SURE I DID NOT GIVE THEM MY CREDIT CARD # OR AUTHORIZATION TO CHARGE ME ANYTHING. AS FAR AS I KNOW I HAVE RECEIVED NOTHING FOR THE SERVICE IN THE PAST 12 MONTHS. I DID CANCEL THE SERVICE A FEW DAYS AGO AND ASKED FOR MY MONEY BACK. THEY GAVE ME CREDIT FOR ONE MONTH AND DISAPPROVED ALL THE OTHER MONTHS. I DID CALL MY CREDIT CARD COMPANY TO DISPUTE THESE CHARGES BUT THEY SAID THEY COULD ONLY GO BACK 4 MONTHS. IT LOOKS LIKE I AM OUT SEVERAL HUNDRED DOLLARS FOR THIS SCAM UNLESS SOMETHING ELSE HAPPENS.