Vodacom contract cancellation

Contacted the Vodacom Customer service at *** to move over to prepaid as my contract expired already. Was informed by the representative that it can't be done. She tried to sell me another contract. After not being successful she threatened to cancel my number in total. I requested to speak to her supervisor, very arrogantly she told me there is no supervisor. Not solving my issue I was told I had to call again to speak to another consultant. Which I did, but was informed that the system can't pick up my number and she will send an internal email and someone from vodacom will contact me before end of day. Till now nothing has happened. Poor service.