The usual refund conditions are “less than two hours of play, within two weeks of purchase.”
Not much you can do - if the machines decide you don't get a refund, well, then you don't. I haven't bought anything on Steam since.
0. https://www.accc.gov.au/consumers/consumer-rights-guarantees...
Ironically because speed-running requires a lot of practice this often means purchasing two copies of the game - the first to practice with, and the second to be (potentially) refunded!
There should be some sliding scale where you can make a great 2 hour or less game without the risk of infinite refunding (perhaps the game could be marked with a "half-way" point, etc, though that would involve the shop actually playing it).
I bought 2 copies of a game advertising co-op to play with a friend, only to discover it's local-only. (Steam didn't have separate "local/remote play/online co-op" labels yet) I opened a ticket and they refunded me as a "one time exception".
I suppose I could have invested time to diagnose the original issue (drivers, OS upgrades, etc). But, it was good to see that Steam just refunded without insisting it was an issue on my end (which, it may well have been, given the disparity of Linux systems).
They refunded my game after a short and polite message without any fuzz. I said thanks by buying a different game instead. Shame for the dev yes, but it was already an older one, that the developers moved on from years ago, so I didn't felt too bad about that.
Would that experience have been different if I wasn't an Australian?