Vodacom contract

Good afternoon, i have a cellphone contract which expired in July2020, in that time i was busy with a big case at work whereby they wanted to declare me unfit for work, on the 10th of October 2020, i phoned vodacom to cancel my contract completely(2 of them), they said they’ve loaded it on the system, end of October 2020 a payment went of and i was fine with it as i believed it was notice, then end of November2020 another payment went of and i phoned them on the 2nd of December 2020 and they told me they saw it was loaded on the 10th of October and that they will escalate it, at the end of December 2020 yet another payment went of and still without pay i did explain my situation so i phoned them again on the 30th of December 2020 and the same message that they noticed it was loaded and they will escalate it, end of January &February payments went of and i called the bank to withdraw the payments as i was tired of asking them to cancel it, the past week i’ve phoned them interacting the whole week and they tell me i’m in arrears and they cannot cancel the contract, the one consultant just put the phone down, i’ve explained on e mail how many times I’ve cancelled the contract and their reply is i need to give 30 days in advance notice, I don’t know if it’s30 days or 30 months or 30 years, I don’t know what else to do to get the contract cancelled