Strugling to cancel a contract at MTN

On 07 Septemeber 2015, my contract expired. On 08/09/2015 I called and cancelled and was told that the Retentions team will call me back. I have called every day since then and get told a different story every time. I have spoken to Shandre Hendricks and she was not very helpfull. It seems that this division is deliberately tasked in this manner to give the customer that wants to cancel a hard time and thereby discouraging the customer to cancel or they are deliberatley doing this to delay the cancelattions Please help.