REVERSAL CHARGE

I made a manual payment to Telkom on the 23/12/2025 for my fiber account. Telkom then debited my account again on the 1st of January 2025 taking my fibre account into a positive credit balance, but my cheque account was now overdrawn because of this. i then reversed that payment. Telkom now is charging me for reversing that payment. Why am i being PUNISHED for making payment ahead of time?