Telkom closed my account with out explaining I will lose my no

I logged a complaint on hello Peter and with Telkom. No one called me yet. Telkom staff so unfriendly I called in on Monday to cancel my contract Andele Nghobo the consultant that helped me did not explain the difference between cancelling the contract an pre paid. I assumed if u cancel the contract it automatically works as a prepaid card. He said I was supposed to ask after cancelling my no. I had the no. For 2 years why would I cancel the no. He told me the no. Will be charged to prepaid in 72 hours. When I called again I spoke to Kenney who said 72 working hours meaning only next week. They don't want me to logged a complaint on there side keep saying a manager will call but nothing has happened. Telkoms service is worst then the government.