Faulty debit order system (missing debits or Change dates)

Old mutual has a poor tendency of neglecting to update their debit system or changing the debit order dates. This causes a huge inconvenience and a disruption on client policies and bank accounts. I have visited their different branches with an attempt to sort these issues out, they keep doing tbe same mistakes over and over again. I have on a number of times reinstated my lapsed policies with them due to their own irresponsibility, but i notice that this isnt stopping. Worse, instead of notifying a client via sms or email about the missed debit, they do it via post office.