********** conduct by call agent

I currently hold two client policies, one for hospital cover for my parents and one for clientele legal. This morning I received a call from an agent, whose name I could not recall, and was not able to speak hence I said that he could call at 9. At 9 when he did call he asked for someone else and hence I realised that he had the wrong number and explained that it a Nedbank phone and I am not the person he is looking for. He then proceed to tell me I am lying and unprofessional and he does not have time to waste. He refused to allow me to speak to a manager and told me to call the head office before cutting off the call. This is a very poor representation of clientele as an FSP.