REFUSAL OF CANCELLING MY CONTRACT!

I HAVE FILLED IN THE FORM TO CANCEL MY TABLET WITH TELKOM TWO MONTHS PRIOR TO MY CONTRACT REACHING THE END OF ITS TERM ON 22 OCTOBER 2015. TYGER VALLEY BRANCH NEGLECTED TO SEND IN MY FORM TO THE CANCELLATION DEPARTMENT AND ONLY DID SO ON 25 OCTOBER 2015. RESULT BEING THAT TELKOM CHANGED MY CONTRACT TO A MONTH TO MONTH BASIS WITH A HUGE BILL FOR THE END OF THE MONTH. THE CALL CENTRE, ONLY PERSON WHO CAN ASSIST, CLAIMS THAT THEY TRIED TO CONTACT ME 3 TIMES AND COULD NOT REACH ME, OF WHICH NUMBER THEY HAVE ON THEIR SYSTEM IS CORRECT, AND RESOLVED MY QUERY (CONTRACT STILL ACTIVE SO NO QUERY WAS RESOLVED) AND CLOSED MY CASE!!!!! I AM ABSOLUTELY DISGUSTED BY THEIR SERVICE AND LACK OF COMMUNICATION IN ORDER TO RESOLVE MY QUERY EVEN THOUGH I HAVE CALLED THEIR CALL CENTRE 3 TIMES NOW AND VISITED THE BRANCH NUMEROUS OF TIMES. THE MANAGER TO ASSIST THE LADY IN THE CALL CENTRE CAN'T BE REACHED AS MY CASE NUMBER ***6 NEEDS TO BE RE-OPENED.