Continuous Harassment from Norton - Lambrianos with no assitance to resolve.

I am being harass from Norton with constant emails that my Vodacom account will be block for non-payment. Firstly the email that they send me is address to a Mr Mataba, then the account number and reference number is not mine. So I phone and the lady tells me that because its not address to me but it came to my email of course its for me. When I told her, no you cannot say that, she insist its a typing error and I should no its for me. I then tried to explain to her this cannot be. I acknowledge I have a Vodacom account but I am not Mrs Mataba, she then ask me if I'm shouting at her, I says no, and she goes again, are you shouting, I then keep quiet because clearly my voice is to loud for her. And when I start talking again she says please just be polite stop shouting. Where is the customer service? I just put the phone down because clearly the aim is not to resolve the account.