A very irate former client

I signed a 24 months contract with vodacom back in 2019 which was supposed to have come to its natural conclusion in September 2021, but Vodacom continued to debit my account. Now I called them to ask how I'm still in arrears with them, to my surprise the contract you sign with them is an ever green contract, the "12, 24 or 36 months" you are made to sign is just for show it has no legal bearing, one still has to call Vodacom to terminate a contract that no longer exist. To add insult to injury they won't terminate my contract because I am in arrears, and even when I implore them to terminate and I will pay whatever due now on the 1st of December which is on Thursday, they still refuse because they want me to still be liable for the following month. They haven't provided a service to me, the number they talk about is not even in use, it's not like I have utilized their data or any other services and refuse to pay for it, it's just a huge company with financial muscle bullying a guy with nothing. They can go into their system and check when last that number ever was in service then they will realise that they actually owe me for all these months they debited without legal cause. I don't want their services anymore and they will not terminate because they see me as this golden egg goose. Very appalling, ****************.