Breach of contract

Upon checking my banking transaction history I saw that Old Mutual Finance attempted to debit my account on the 23/11/2018. This is unacceptable as my agreement for their debit order is the 30th of each month! They have no right to deduct money on a date they deem fit without my consent!!! I do not even get paid by that date! And this when my account is up to date with the organization. I am furious! This is ******* and I will not stand for it! Whatever funds I have left in my account at this date is not for their deduction and I feel this is a breach of contract!