How can I get my money back from a unauthorized debt?

PLEASE HELP I CAN’T GET THEM TO STOP SENDING LEADS AND TAKING MONEY OUT OF MY ACCOUNT!!!!!!! IN APRIL I HAD SOMEONE FROM REPLY Real Estate CALL ME AND ASK ME TO TAKE SOME LEADS. I WAS TOLD I COULD STOP AT ANY TIME. SO I THOUGHT I WOULD GIVE IT A TRY. I GAVE HIM MY DEBT CARD # AND ASK HIM TO ONLY PUT THE 1ST MONTHLY SUBSCRIPTION FEE ON IT AND IF I DECIDED TO CONTINUE I WOULD GIVE HIM A DIFFERENT CARD. THE LEADS WHERE BAD! THE LISTINGS (3) WHERE ALREADY ON THE MARKET AND I COULD NOT GET RESPONES FROM THE BUYERS. I HAVE ASKED THEM OVER AND OVER AGAIN TO STOP SENDING THEM. THEY HAVE TAKEN A TOTAL OF $585. OUT OF MY CHECKING ACCOUNT. I HAVE TRIED TO TAKE MY DEBT CARD # OFF THEIR WEBSITE BUT I CAN’T. PLEASE HELP