After contract is done Vodacom stole from my account

I'm not surprised I have another bad experience with Vodacom.

After months of hounding me that my contract is going to end and me politely telling their staff I don't want an upgrade, just to cancel it, I see Vodacom decided to straight up ***** from me after my contract was done.

I got hold of so many people, often times they told me their system wasn't working or honestly had no idea how to help me. What made me laugh the most is that they were all called "Sharon", and when I tried to follow up with any support staff they hang up in my ear.

My contract finished on the 10th and I've asked some staff the escalate the ticket but today I've been billed for more than my original contract amount. What's worse is that it's for 2 sim cards.

Please have someone assist me with this issue as your only staff member that tried to help told me that they were going on leave and won't be able to speak to me again.