Very bad

I am not happy with Vodacom, I was given an insurance policy that I have not authorized for and I am still wondering as to what device they have insured when I call vodacom customer care I am giving a run around. I called the vodacom insurance company I was told that the was an Insurance activated in December and I ask who gave them authorization to activate it I don't get the answer and now they tell me I owe them money and that have blocked my device because I have a Sim connection only with Vodacom.