Disappointing online banking

How is it possible that an insurance company can run an unauthorised new debit order(for a new premium amount which i rejected before cancelling), after I’ve stopped payment on the old debit order, AND a week before the agreed debit order date AND worst of all the debit order appears no wear in the list for reversing and stopping debit orders, so I'm unable to reverse it. This will be now the second month that I’m paying a double insurance premium! Now I have to spend my valuable time sorting this ******* out!? I'm quite sick and tired that my account can just be played with by service providers in this manner, from unauthorised debit dates to incorrect amounts and unauthorised premiums, where are the checks from the bank's side as to how my account is debited by these seemingly *********** or just plain dishonest service providers??