Vodacom contract cancelation non compliant

I had a only data contract ( number ***) with Vodacom with a phone number *** on pay as you go. I phoned Vodacom on 1 August 2025 to discuss options to cancel my contract. Note, Vodacom debit me on the 27th of the month, which then data is loaded from the 1st of the next month. I had received a premature cancellation quotation ref *** for an amount payable of R193.64 to cancel my contract, valid for 30 days. I decided to cancel the contract on 13 August 2025 and paid the amount of R193.64. I had sent my relevant documentation with proof and Vodacom accepted the cancellation. On the 28 August 2025 I see there was a debit order for the amount of R342.49 on my bank account, I decided to reverse it as Vodacom did not communicate any other amount to be deducted from my account, I believe its ******** to do this as I did not authorize it. I did discuss this with after I found the amount on deducted from my bank account. At Vodacom, still no one at the call centre can give a reason for this amount, they said I must just pay it as it is due. After a while, I had received my updated credit score, its downgraded due to a Vodacom account not paid. How can this be possible? Then Vodacom also decided to block my pay as you go number *** completely from receiving and making calls, not sure how they can do it? I would like Vodacom to clear my negative credit score and unblock my Vodacom pay as you go account asap. Thank you.