Vodacom poor service

I have been struggling for weeks to cancel 2 sim cards attached to my tablet contract that ended Dec 2019. I never even know that I was still paying for it. I only realised when sales people started phoning me to try and upgrade. I then started my investigation only to found out that these 2 sims have been hidden under my 2 tel. accounts with Vodacom, Why? My debit order for tablet ended long time ago, so why were these moved so I cannot track? So, today I received a refno for the one cancellation, but for the other sim, the other the lady all of sudden could not give me one, I insisted, she then asked for my passport no. I said why? I never used it or recorded it, she insisted its what I used to open account, I said no it's not, it ID. So eventually she took my ID, then my email to try and get reference. Then line went dead and phone rang in my ears and all of a sudden I was asked to rate Vodacom's service. So what more must I do to cancel these contracts, one I never knew I had. I spent over 2 hours on the phone and I still dont know if this was cancelled. PS: in all my calls the sales people tried their level best to convince me not to cancel, no customer service at all, not what I want, but their needs!