bad service

I sent an email in to MTN in February 2016 requesting to cancel my contract with them on 15/03/2016 and I also advised them that I want to migrate my number to prepaid. On 14/03/2016 my cell number was disconnected. I called MTN and spoke to Phindile who advised me that she' ll refer my query to the retentions department to reconnect my number and migrate it to prepaid. 15/03/2016 my number still disconnected and I called MTN again and spoke to Palesa who advised me that it take 24 hours to reconnect the number, she said the query was logged at 16h30 14/03/2016 so my cell number should be reconnected by 16h30 on the 15th. 16h40 15/03/2016 I called MTN again and spoke to Keolebogile and told her that my number is still disconnected and she told me that the matter has been referred to the technicians, I asked her to refer it to a manager she then went to Reginah Baloyi(supervisor) when she came back she advised me that Reginah is busy but she sent and email to someone at retentions to attend to the matter before 5pm. Today 16/03/2016 11 am I called MTN again and spoke to Siyabonga Mbosula explained the whole story again he said he'll refer the matter and my number still disconnected