Riding rough-shod over clients

What nonsense is this! You run a debit order that's supposed to go off at the end of the month on the 7th, a mere 7 days after the previous one, without so much as a notification. And then you have the nerve to send a snotty sms saying it's "for my convenience, so that I can enjoy my NEXT family holiday". How am I supposed to enjoy my holiday when you've thrown my budget off? I did not make allowance in my budget for this early debit order. And what you've done cannot be legal. Our agreement states a certain date for the debit order. You can't just deviate from that on a whim. Please reverse that debit order and run it on the last day of the month, as per the agreement.