Contract not cancelled

I called Vodacom to cancel one of my two contracts and went through the prompts by a machine where I entered in the number to cancel the contract, it advised me that the contract has been cancelled until this month when I received the bill for that contract and I called customer service and eventually spoke to an actual person who told me the contract had not been cancelled so lucky me got to pay an extra month for a contract I don't use because Vodacom decides to have machines do the work which in the end does not get done.