Vodacom playing game with my account

I'm very angry right now January 11, 2021, I called Vodacom to cancel my contract with them and they told me that they will bill me for January and I was fine with that .during the month if February I notice that they have given me airtime when I called they told me that the lady who helped me did cancel my contract and I told the whos fault is that they said it is fine they won't debt my account. 25 February I wake up to a debit order of R253 when I called they told me that they will fix it. this morning again I woke up to debit order of R606 now I feel like I and Vodacom are playing games.