Vodacom renewing Contracts with no authorization

Absolutely poor service. I called Vodacom last year to find out as to when my contract would end and i advised the operator that want to know as i want to cancel the service as I’m not using it, The Operator then advised me that he can downgrade the package so that i pay less as I’m not using it. I called then again as i knew that my service is ending at the end of June 2020. To my surprise the operator advised me that my service is only expiring next year 2021 as it was renewed. i then advised the operator that i never agreed upon any renewal. She advised she will get the operator whom i spoke to give me a call as well. i give her the number i called from as well. To my knowledge all calls are being recorded by Vodacom and i advised her as well that i would like to receive that recording as i know i never agreed upon any renewal. This call was made on Tuesday 02/06/2020. Today is Friday 12/06/2020 and no response have been received as yet. I want that call whereby I agreed for the extension. I know that was never done and therefore Vodacom have no form of any sort whereby I agreed for any renewal. This would then come down to ***** and i need answers. How is a contract renewed without the customers approval. I need that recording. They are quick to tell you that calls are being recorded