Vodacom late Cancellation

In January 2020 I phoned Vodacom to inform them that my contract is expiring in February 2020. The consultant informed me that she cannot cancel the contract as I need to phone in during the first week in Feb 2020. From my understanding at the end of Feb 2020 would be mt last premium. I phoned Vodacom now 04/02/2020 at 14:00 and the consultant informed me that I had to had phoned in, in Jan 2020 for the contract to be cancelled in Feb 2020. I told her I did and this is what I was advised and could she please have a look at the activity log for when last I called. She told me the last time I called was in 2019. My itemized billing from work number shows the calls made to vadacom with regards to my contract. Today during the conversation the consultant informed me I have to now pay for Feb and March due to my late cancellation. This is ridiculous!!!