Still paying after canceling twice

I have been trying to cancel a Sim contract since 2 May 2025. I received the Sim with a second device, but never used it. Then after 2 years I started to pay for 1GB data on that Sim and the number appeared on my profile. (Still never used it. I do not even have it). I was told that I will need to pay a cancelation fee which I said will be fine just to get the number off my profile. I was told June will be the last payment month. I emailed again 9 June to ask for the confirmation. June and July passed. Still not cancelled. I called again the 30th of July and was informed it is being escalated because the Vodacom representative did not follow the correct steps to cancel the Sim. It is end of August and still no communication. I have sent emails with no reply. The contract should end September, but I am not getting a confirmation re cancelation from anyone. I do not even receive an email after my telephone conversations to confirm anything. Ref# 5 -*** 14 received from call made on 30 July 2025.