FINRITE / VODACOM INVALID INSURANCE CHARGES

I have been paying insurance on a laptop contract of which the contract was upgraded to a phone in October 2019. At the time I signed a document stating that I will source my own insurance on the phone. Therefor I assumed that the insurance on the laptop will lapse as the item was paid off. I have requested the cancelation on emails sent on the 15 Jan 2021, then 1 Feb 2021 and again on 26 March 2021. I have still not received ANY feedback to date