Vodacom exploiting pensioner lady (loyal customer for over 15 years)

I am a good and loyal client at Vodacom , for over 15 years I have been supporting them. I am a pensioner, and they are always trying to **** me, probably because of my age they think I am not smart. Last year around June/July I upgraded my phone, and also cancelled my old contract (upgraded another 1 of my numbers) and cancelled one that was almost done, I phoned twice to cancel, I also phoned the insurance company they use the cancel the insurance for that same contract I cancelled. The last payment for that contract was supposed to be October 2025, and the last payment for the insurance was supposed to be the month after that. But still today on my statement it shows under that number I am still paying for the contract and the insurance. And this is not the first time something like this happened, a few years back it also happened and I was never compensated for the amounts I paid. As a loyal customer I think this is really unprofessional to basically exploiting people like this especially pensioners.