NOT GETTING WHAT I PAID FOR AND NO PROBLEM SOLVING

I HAVE REGISTERED WITH COLLEGE SA ON 03-05-2010 TO DO MY GENERAL MANAGEMENT DIPLOMA. I RECEIVED THE FIRST SUBJECT AND COMPLETED, AS I GOT MY SECOND SUBJECT I HAD A FEW DEATHS IN OUR FAMILY - AT THE TIME I DID NOT STUDY AS I WAS IN MOURNING AND HAVING TO TAKE CARE OF OTHERS. I DID NOT FILL IN A \TAKE A BREAK FROM\" AND ONLY STARTED STUDYING AGAIN IN SEP 2014. I PHONED COLLEGE SA NUMEROUS TIME JUST TO GET MY BOOKS AND TO PAY MY EXAMS AS I HAVE PAID COLLEGE SA IN FULL IN 2011 ALREADY! I PAID 25 000 RAND IN FULL! NO THEY TELL ME THAT THE PRICE IS SO DIFFERENT THAT I NEED TO PAY IN - THERE IS NO BOOK THAT WILL COST OVER R1000 RAND AND I ONLY HAVE 12 SUBJECTS IN TOTAL FOR MY ENTIRE DIPLOMA. MY SUBJECTS ARE R600 AND I ONLY HAVE 12 EXAMS TO DO. I NEVER PHONE FOR A TUTOR BECAUSE THEY NEVER ANSWER. I USE NO SERVICE FROM COLLEGE SA, ALL I WANT IS MY BOOKS AND MY EXAMS PAID. BUT THEY REFUSE TO AND COME UP WITH EXTREMELY RIDICULOUS EXCUSES. THIS IS UNACCEPTABLE! I PAID OVER R24 000 RAND IN FULL! I WANT MY STUDY MATERIAL AND MY EXAMS PAID THAT IS FAIR! MY ESTIMATE: (I have looked at the prices) 600 X12 = 7200 800X12=9600 FOR BOOKS - ALL THIS = R 16 800 I HAVE PAID 24 800.I WANT WHAT IS OWED TO ME"