Firestream have ********** billing practices

Whilst FireStream are good at providing fibre, sadly their accounts department are not. I regularly get charged in the middle of the month, and what’s really scary is that the charge seems to come through as soon as a deposit has been made into my account. I’ve asked them several times to ensure the payment is debited on the 1st of the month, AS AGREED IN MY CONTRACT, but they have neither acknowledged my emails nor had the courtesy to rectify the situation.