DOES ANYBODY AT CELL C KNOW WHAT THEY ARE DOING

CELL C ARE TRYING TO CHARGE ME R 448.98 FOR A CONTRACT (I HAVE SIGNED) FOR R 299.00 PER MONTH. CASE NUMBER ***. I HAVE CALLED CELL C 6 TIMES SINCE I GOT MY CASE NUMBER ON THE 26TH OF NOVEMBER AND KEEP GETTING TOLD SOMEBODY WILL CALL ME BACK. AS IF 6 CALLS IS NOT ENOUGH I HAVE ALSO BEEN INTO CELL C MIDRAND STORE TO TRY AND GET THIS PROBLEM RECTIFIED. CELL C KEEP ADVISING I WILL GET A CALL FROM THE PERSON HANDLING MY CASE AND THEY DO NOT BOTHER TO CALL. I KEEP GETTING SHOVED FROM DEPARTMENT TO DEPARTMENT AND AM GETTING NOWHERE. I WORK FOR A LIVING AND I HAVE TAKEN MORE THAN ENOUGH TIME OUT OF MY DAY TO TRY AND SORT THIS PROBLEM OUT. DOES ANYBODY AT CELL C ACTUALLY KNOW WHAT THEY ARE DOING ?