Subscription not cancelled after 3 years!!!

I have been paying for a tablet subscription since 2016, which I was unaware about. I was told that when I upgraded in 2018, it should have been replaced with my new contract as the the device had been paid for. Now I was wanting to upgrade to another contract to only find out, I'm still paying for this subscription in 2021. I have been in contact with multiple people who have assured me that it has been cancelled (this was now in February 2021). But when opening my statement this month, it is still there. The worst part is that you cannot speak to the same agent as each time you get put through to someone else. So thank you for your reassurance of a lie "Jasiah" but it has not been cancelled, even after you told me I could not speak to anyone in cancellations but you had done it for me. I am done with Vodacom... the most expensive network with such poor service. My next step is to put a stop order to this debit order and go to MTN. Regards Lorin