Despite having closed my account a month ago with my old bank, I still haven't received a refund on the amount owing to me, and today I discovered the bank is trying to alter the amount of the refund as well. They failed to inform me of this, and still can't tell me when I can expect the money.
An official complaint has been lodged and will be escalated to the Banking Ombudsman if it cannot be resolved. The Ombudsman not only has some superb powers, but also the requirement to report systemic issues and serious misconduct to ASIC.
Banks hate having matters escalated to the Ombudsman. ;)