Unable to cancel contract despite follwing process

I wanted to cancel one of my cellphone contracts. I enquired at local Vodacom shop how to cancel contract. They refer me to contact Vodacom on 082135. The following happened: 24 Feb 2021: I phoned 082135. Spend most of the time trying to get the agent to accept that I want to cancel my contract. They kept on pushing to change the package type. I declined again and again. At the end the call centre agent confirmed that the contract will be terminated end March. No reference number was provided during this call.

7 April: I noticed that another deduction was done on my bank account. I Phoned 082 135 and indicated that another months subscription was deducted and the contract still not cancelled. I requested a refund and my contract to be canceled effective end March as originally requested. Refnumber received: *** agent: Noluchando Mkhize She indicated that she could not find a record of the previous call and cancelation request. I however have the call log on my phone as proof. She then wanted to upsell to other packages, prepaid, etc. I declined again. She then indicated that she can only terminate the contract from End of April. I indicated that I want credit for April's deduction, since it was not authorized. She then indicated that she would escalate this incident, but could not send a email to confirm, since she doesn't have access to email. Later the same day I received a email and a WhatsApp to indicate that my request to convert to pre-paid was received! This was clearly not as discussed or requested.

30 April: Received a email that confirmed that my number was converted to a prepaid contract. Again, clearly not what I requested.

2 May: I noted that another R220 deduction went off against the contract.

As can be seen from the above trail, this constitutes breach of the verbal agreements done telephonically(which Vodacom do record) and ********** actions on the Vodacom contract management side, since unauthorized changes to my contract was done without my explicit authority. Further monies was deducted, which should not have been.

I want this contract canceled and my money reimbursed.