Disgusting service(am I just collectin ref numbers

I called in 23 Sep to close contract that was coming to an end specifically asked the agent if there is any payment needed as I need to put this to bed I'm no longer employed he says no payment needed contract will close in 7 days ***. Complained on helopeter and im sure person that rep**** did not refer to my calls or reason for my complaint just said account in arrears cannot be closed. Just like that. 21Oct called again as contract not closed asked for reason they said I owe R48 some change *** and paid called again 23 Oct now was told I owe R500 some change I was now puzzled *** spoke to manager Mr H Cupido was told he will definitely investigate and call me nonday ***. Today I called guy went back to management and I was promised a call before 5pm *** did not receive call. Im furious with MTN nobodyknows what they doing I NEED ANSWERS.