See this regarding my experience.
It is possible to get satisfaction although it requires using the letter of complaint tool, citing chapter and verse of the Australian Consumer Law, and requires a well researched claim regarding expected product life citing evidence it falls short of industry norms, which could all be challenging when one has other life issues complicating your daily life.
If you pursue your rights, send/deliver your letter of complaint to the retailer where you bought it. If you bought it directly from Apple give it to the Apple manager in the first instance and work your way to the MD.
Good luck with your phone, and I wish you and your partner well with the medical issues.
