cancellation of contract

PLEASE HELP!!! I WAS APROACHED BY TWO REPRESENTATIVES FROM BODY LAB GYM AT SAMMY MARKS SQUARE, ASKING ME IF I WANTED TO JOIN THE GYM. I TOLD THEM THAT I WAS A STUDENT AND THAT I WASN'T WORKING, THEREFORE I WILL NOT BE ABLE TO PAY FOR THE MEMBERSHIP FEE. THEY INSISTED THAT I SIGN THE 2-YEAR CONTRACT WITH THEM AND THAT I SHALL RECIEVE FREE TRAINING TILL THE END OF OCTOBER LAST YEAR. UNKNOWINGLY, I SIGNED THE CONTRACT THINKING I WAS SIGNING UP FOT FOR A FREE MEMBERSHIP, AND I WAS TOLD THAT MY MEMBERSHIP WILL BE ACTIVE IF I JOINED THE GYM. ALL OF A SUDDEN, THEY STARTED DEDUCTING MONEY FROM MY ACCOUNT FOR SOMETHING I HAVE NEVER EVER USED. I ALSO RECIVED AN SMS TELLING ME THAT MY ACCOUNT HAS BEEN HANDED OVER TO BENNET AND ASSOCIATES AND THAT I OWE THEM R1894. I CALLED THE CALL CENTRE YESTERDAY AFTERNOON AND I WAS TOLD BY ONE OF THEIR CONSULTANTS, THAT THERE IS NOTHING THEY CAN DO AND I CANT CANCEL MY CONTRACT. I TOLD THE CONSULTANT THAT I WILL BE ABLE TO AFFORD TO PAY A R150 PER MONTH TO SETTLE MY DEBT. I DONT EVEN KNOW WHERE THE GYM IS LOCATED. I DONT KNOW WHAT TO DO. PLEASE HELP ME!!