Vodacom lack of urgency

I did a premature contract termination with vodacom and I asked them to put my number on prepaid, i don't owe vodacom a cent.. I have been calling them non stop to get this resolved however it seems like vodacom is not interested in terminating a contract on their side. Today the agent i spoke to even cut the call on my ear, i keep receiving the same information that the matter will be escalated and I ask myself if the people that are supposed to do this are imported from other countries or what