Debit order issues

I got an sms beginning December and mid December which stated "MFC. If you want to move your December debit order date on account 5******xx1 from 27 Dec 2021 to an earlier date between 18 Dec 2021 and 24 Dec 2021, simply reply (at no cost) with the date you want the instalment to be debited (eg 10 December 2021). Questions? Call ***.

I called around 22 / 23 December early morning and told the lady to NOT debit my bank account on 24 December as there will be no money in my account as my bosses are not paying us then. She must leave the debit order as is on 27 December. She assured me. A few minutes ago I get a telephone call to ask if the money went off, I told the lady that I asked for the 27 December. Immediately after the call I logged in online and saw my request was not honored and a debit order was processed on 24 December!

Why do you send an sms to ask me if I want to move it then you go against your customer's wishes? Next we get the Bad Payer mark behind our name because you cannot keep to the agreement.