Refund my money for cancelled insurance

I cancelled my Vodacom cellphone insurance on 29 July 2022. They are still billing me R181 a month. I lodged a dispute. No feedback. I refused to pay the insurance. They cut my phone services. So I paid. They have billed me yet again for insurance. I don't want the insurance. I cancelled it. I want my money refunded. I phoned the Vodacom insurance several times on *** but eventually hang up after 15 minutes as nobody answers. I DON'T WANT THE INSURANCE.