Insurance Premiums

On the 25th of august 2018 I upgraded my contract with Vodacom and opted no (I have documents to back this up) for insurance. I have not being paying attention to my statements until last week when I realized that the insurance was active. I have called the contact center and went to Vodashop and I'm not getting any joy from any of your consultants. Yes I want to cancel the insurance and I want to be paid back all the insurance premiums that I have paid to date. I don't think that will be difficult right? I can make this a tedious process by asking for interest as well because I know my right but can we please get this resolved soon. Before I take this even further and have the contract terminated because of this dishonesty.