Vodacom Call Centre Upgrading without Consent

I recently called the call centre to have a subscription cancelled due to the contract period expiring. This was done. I also cancelled both contract covers that was added at inception of the contract which was also done. However, I found out soon afterwards that one of my other airtime subscriptions that had expired and was going on month-to-month, was conveniently upgraded to a 1GB top up, which I NEVER EVER consented to. In fact, this number was not even spoken about during the call and had I known it expired in March 2024, I would have cancelled this too. By the way, the upgrade was apparently done by "EL-NarAR001". Unacceptable! I am thinking twice about vodacom after decades with them.