Unauthorised Debit on an up to date account

On 25/11/2020, I have made a payment of R4,794.43 via the Telkom App, and so this was successful with no outstanding amount whatsoever.

Today, 30/11/2020, you are debitting my account for R1,275.00, for what reason?

I need that amount of R1,275.00 credited back to my bank account because my Telkom account is up to date. I have other plans for the amount that you have debited.

Please reverse the amount of R1,275.00 back into my account.

Thank you.