Cardmember%20Services - Credit rate reduction SCAM

These people called my parents to reduce their credit card rate, they said they called the card co and put them on a program. The card co., sent a check for that card, my parents were told to write the ck to themselves, deposit it, then write a personal ck for the balance of the card and the rate would be lowered. CONCORD FINANCIAL ALSO KNOW AS CAM SERVICE HAVE NOW CHARGED 1995.0 TO THE CARD!!!!! I HAVE BEEN RESEARCHING AND FOUND OUT THAT MY PARENTS WERE SCAMMED !!!!! I have disputed the charges and am doing every thing I can to stop this!!!