UNABLE TO CANCEL TELKOM LANDLINE AT HOME

I AM SO FRUSTRATED AND STRESSED. I HAVE SOLD MY HOUSE AND WILL BE MOVING OUT IN THE NEXT FEW WEEKS AND MY PROBLEM IS THAT I CANNOT GET ANYONE AT TELKOM TO ACKNOWLEDGE MY CANCELLATION REQUEST. THERE IS KNOWHERE ON THE INTERNET WHERE YOU CAN FIND OUT HOW TO GET YOUR SERVICE TERNMINATED. AFTER WAITING 45 MINUTES, THE TELKOM CALL CENTRE GAVE ME AN EMAIL ADDRESS TO SEND MY REQUEST TO, BUT MY EMAIL KEEPS COMING BACK WITH THE MESSAGE \THAT THE BOX IS FULL AND TO TRY AGAIN LATER"WELL A WEEK LATER AND IT IS STILL FULL. THE BRANCHES ARE ABSOLUTELY USELESS AND GIVE YOU COMPLETELY DIFFERENT EMAIL ADDRESSES TO SEND YOUR REQUEST TO. THERE IS ALSO KNOW ACKNOWLEDGEMENT OF RECEIPT OF REQUESTS. LEASE CAN SOMEONE PLEASE HELP ME?"""