Vodacom debit still going off after Cancellation

I have cancelled my Vodacom contract on 5 August 2020 and as per 1 month notice period my last day would have been 30 September 2020. Another debit order went off for October and I phoned Vodacom and find that my contract is not cancelled yet. I had to call a few times with no luck. I eventually written a review on Hello Peter. Someone phoned me back and and told me they will cancel it immediately in 24 hours, but I will not be refunded, because I had the benefit of the airtime, but it was fine with me, I just want it cancelled. After 24 hours I ported my number to another service provider. To my surprise another debit has gone off today, the 3rd debit order after I cancelled my contract on 5 August. Now I do not even have the benefit of the airtime anymore, as this is not a Vodacom number anymore. I am not even going to waste my time to phone Vodacom again, as they do no effort to sort out a problem. I will just log a dispute with my bank and I will never go into contract with Vodacom again and I will not recommend Vodacom to anyone.