I contacted ME BANK to ask them to match a lower rate of competitor for my investment mortgages.
They offered me a rate that was less than competitive but matched their new lending rate. I took advice, calculated my budget, and made plans for the savings that would ensue. I telephoned them and accepted the rate and they confirmed the products. Two weeks later they contacted me and rescinded the rate. I told them that if they had made a mistake they needed to honour that mistake. They disagreed.
I've taken the matter to OFCA and await a resolution. It is disappointing that ME BANK is turning out to be as disreputable as any of the other Australian banks, into which there is now a Royal Commission. Total disdain for the customer.
Was anything signed in terms of a final contract for the loan stating this rate? If not, I'm not sure there is anything you can do. While I agree that it's bad on their part for initially accepting to match the rate, if there was nothing final about this offer then there is no legal binding to it, I'm not sure anyone can force their hand to process the loan at the rate you wanted.
Perhaps look around for other lenders that match your requirements for LVR etc.?