nothing serious as such, hence i didn't think of going to ombudsman or twitter route.
i was maintaining AMB/AQB well above the minimum requirement for a Priority account for the last year or so. i sent them an email for upgrade. in reply, they sent me a step by step process to do it via app. but the app was showing that i am ineligible for upgrade. i escalated this to pno, and they sent the exact same reply. it is as if they did not even read my email.
so i started moving my balance to other bank now as they dont care.