Telkom change debit order date a week earlier, gets rejected, the Telkom charges R202 for rejected fee

I'm a contract customer for many years now. The debit order runs on the last day of the month since I have the contract. In December Telkom decided to run the debit order on the 23rd of December, without any communication, and the debit order returned because I haven't receive my salary yet. The debit order also went of on the last day of December as it should. On my new invoice there's a debit order rejected fee of R202 because of the first debit order that tried went off a week earlier. Terrible