Canceling of contract

I had a contract with vodacom since 2021 for sumsung a22, which I was wrongly misrepresented into believing it's a 24 months contract by their sales person but it's actually 30 months. I was advised that I'll be paying R190 per months but I ended paying R298.00 per month but that not really my complaint right now, I've been calling vodacom to cancel my contract with them since I'll be done paying for the contract this month. Their call center agents has been telling me that my account does not show the end date for my contract and I suggested to email them mine, they refused.I told them I don't want them to load any data for me this month because I don't want to owe them since I'm canceling my contract but they did, I am tired with vodacom and their evil stunts, I just want them to cancel my contract with them.