Miway debited my account despite request not to

I called Miway several times to change my debit order date with no luck. Even my requests for a call back went unreturned. When a their consultant eventually called me the debit order had already gone through on the wrong date into an account with no money resulting in exorbitant bank charges for me. I informed this consultant not to resend this debit order since i was annoyed by the late response and the resulting bank charges. To which she gave me attitude and eventually agreed not to resubmit the debit order. I also reiterated this with a second consultant , however less than 48 hours later the same debit order was resubmitted on the wrong date again, into the same account again, resulting in additional bank charges and an overdraft and interest charges. I am so disappointed and am cancelling my policy with them with immediate effect as soon as they get around to picking up my calls or calling me back. I am thinking of reporting them to the insurance ombudsman if they can not refund me for the bank charges incurred unnecessarily and money debited from my account after giving them clear instructions not to debit me.