Poor Service - I regret taking out a contract.

I took out a contract with vodacom in February and one of your consultants advised my fiance it was a good idea that he took a device insurance cover for me. 3 months down the line, I was invoiced with a huge bill. When I enquire about it from Vodacom, I was then informed its an insurance. To my surprise I was shocked coz I never took any insurance, I was transferred to the insurance department, they told me, when my fiance app**** for the insurance it pulled out my details but still I never gave my consent for my account to be debited. They assured me the policy will be canceled.that was in June, until now, I still have an outstanding balance from vodacom insurance, and it is affecting my credit profile, it reflects as if, I'm in Arrears whereas I'm still paying for my device every month. How does 1 get out of this situation now because it seems as if I will be in Arrears for the rest of my life. I've called more than 100 to vodacom insurance still no solution