CONTRACT CANCELLATION

MTN PLEASE CANCEL MY CONTRACT, I CALLED IN I SENT EMAILS AND STILL NOTHING THIS MONTH I RECEIVED A STATEMENT AND A CALL THAT MY PHONE IS DUE FOR AN UPGRADE NOOOOOOOOOOOOO CANCEL THE CONTRACT...YOUR SERVICE SUCKS AND YOUR PEOPLE DONT WANT TO WORK THEY CAN ALL LEAVE SOUTH AFRICA HAS A LOT OF PEOPLE THAT NEEDS JOB