Disregarding debit order date

The agreement for the debit date is always breached. I have given them a specific date to debit my account but they never stick to it. This month my account was debited five days before the agreement date. I’ve called countless times to have this sorted but it seems it never does. I might as well go look for another insurer who will stick to the terms of our agreement. 1st for women please understand that the money on my account is not yours to do as you please with, debiting my account on the day that was not agreed upon is you breaching our contract and *****ing from me, your money will be there on the day that was agreed on and should only be collected then. What you are doing is ridiculous and unacceptable