Vodacom billing double line usage and insurance and pure incompetence

From being with vodacom from my very first phone and being happy I now want to cancel my contract. My contract was up for renewal I checked dates despite the message to upgrade as most times messages are sent sooner and hidden costs occur. So I upgraded my account a month and a half ago and recieved my statement for the month showing insurance that I canceled reflecting twice!!! And my line rental reflecting twice!!! After going in to resolve this with my instore consultant 4 times and being told by vodacom it will be sorted it is not!!!! And the instore consultant was disrespected and spoken to as poorly as what us "valued" customers are in a regular basis. This is also a regular move of ripping one off as this happened to my brother in law too!