TERRIBLE SERVICE

I've been a loyal Vodacom customer for a few year now, this is the first time i have experienced such bad service. I've noticed that there was cellphone insurance added to my account from the 1st of March. I searched through my sms messages and found an sms from them on the 28th of Feb at 3:42 the morning. Really I sleep that time of the morning so I would like to know who gave them permission to add the insurance. I assume all calls are taped so I would like to hear that conversation that time of the morning. I phoned the free 082 numbers given from my phone about 8 times already but it keeps on 'end calling'. They are quick to add something to your account without permission but to try to cancel it is a mission. I AM REALLY VERY DISAPPOINTED IN VODACOM AND ARE SERIOUSLY THINKING ABOUT CHANGING SERVICE PROVIDERS AS SOON AS MY CONTRACT ENDS.