Disgusted with Vodacom

I'm so disgusted with Vodacom right now. I have been a loyal customer for 15 years and an arrogant sales consultant just called me to migrate my account and because I was not comfortable with the change I said no very politely I don't want to make any changes. He went and insulted my intelligence by saying only a clever person would know that this is a better deal for them and slammed the phone in my ear. WHAT A CHEEK, he doesn't know me! If he cannot handle the sales environment he needs to get out of the game. He is giving Vodacom a rotten name. I have never received such disappointing customer service. If Vodacom is condoning this type of behaviour towards their clients they will be losing many loyal clients.