Terrible contract cancelling experience

I have had numerous contracts with Vodacom for 27 years; I am a loyal customer and never use any other but Vodacom in all these years. Last year September I called in to check on due date for a contract to expire to make sure it will be cancelled and not renewed and instead I was signed up for a new contract. Agent I was speaking to confirmed the contract end date then said that I was paying too much and I could go to something else to pay less, I said he if he think I should pay less he could look into that but I need to know that the contract will expire on the date expected and reiterated that I do not need this sim card anymore, that I dont use it and was paying monthly for something not in use and do not want the contract anymore. I even had done cancellation at the right time and got an SMS saying it would be in progress then I got a quote on e-mail for a new contract that I DID NOT accept. But I started seeing money was going off monthly for the number even though I called to ensure cancellation and not renewal. I called and emailed over and over for 4 months to try get the new contract cancelled but no one investigates or checks the recordings, and no one calls you back or even emails with feedback. Customer Service agents are kind and helpful, but when they escalate to try get an investigation done, nothing happens further. When you call or e-mail too much about a certain number you eventually also get blocked from calling about that number. I am still paying every month for a contract I did not ask for, and I want ALL my money back since it started back in November 2025. I have been a Vodacom number 1 fan for 27 years always rating them top scores, but enough is enough, I cannot wait for my other 3 contracts to come to an end too so that I can ensure we have no Vodacom contracts going forward.