Vodacom is charging me for insurance I canceled

In May I lost my cellphone. I went to vodacom to report the phone. I paid the access fee then I was adviced to pay installment for Huawei I took the Honor. In May the insurance for the Huawei phone was canceled. In June my installment was high but I paid it. In July I realized that vodacom is charging me for two insurances. In October vodacom blocked my number saying I must pay insurance which I canceled I refused to pay that money because the insurance was canceled long time ago. On the 9th of December vodacom blocked my number again saying I must R1600 for insurance and they will open my phone again till today my phone is still blocked