Vodacom does cancel a data contract despite my request to do so!

I called on 29 Jan 2021 to cancel a data contract. I was told the cancellation will be processed. Nothing happened and I was billed for it again in Feb. I called again 19 Feb 2021 @ 11h16 to complain and explain I want the contract to be cancelled. I was told the problem will be escalated, the contract will be cancelled and I will be refunded. My March statement still shows this contract. I have called again today (16 March) @ 08h40 and had to listen to the exact same story I was told in Feb. I refused to let it go again as experience showed that Vodacom's talk is cheap. I asked to speak to a senior person and was told a team leader will call me back as teamleaders cannot come to consultants desks due to COVID. I asked to be transferred to a teamleader as I have zero faith that anyone will call me back. Then I was told the teamleader is not yet at work and will only be at work maybe 09h00 or so (another lie was thus told to me!). This time however, I did get an sms saying my contract is not cancelled until I get confirmation via sms that it was cancelled. The Vodacom website does not allow you to log in and cancel and has ZERO Q&A explaining how one can cancel a contract so I rely 100% on these phone calls to get the contract cancelled and clearly Vodacom is not interested in assisting!!!! They are the WORST.