MTN YOUR SERVICE SUCK

I am so frustrated with the service I have recieved from MTN I CANCELLED MY CONTRACT WITH THEM IN OCTOBER WITH THEM THE AGENT I SPOKE TO ADVISED ITS CANCELLED I RECIEVED A SMS SAYING I OWE THEM I HAVE BEEN SEEKING ASSISTANTANCE FROM MTN REGARDING THE MATTER SINCE NOV LAST YEAR THEY SUSPENDED MY ACCOUNT SAYING I OWE THEM 490 ....THE AGENTS AT THE CONTACT CENTRE IS SO *********** AND DOESNT HAVE A CLUR WHAT THEY DOING THEY SAY THERE CALLS ARE RECORED BUT THEY CANT PULL UP MY CALL HISTORY...I ASK FOR A MANAGER AND THERE MANAGERS ARE FOREVER IN MEETINGS ARE UNAVAILABLE.....PATHETIC AT ITS BEST