But only if they have reasonable system for telling the difference.
Nobody in any of these situations thinks they are being unreasonable.
Okay? I didn't say they get to choose. Was the implication of "shouldn't be able" not clear enough? You'd have externally imposed rules.
And in this case google hasn't expressed that they think the process was reasonable, they're just refusing to do anything.
Steam froze my account to punish a PayPal dispute, the amount they would not refund was ~£2. Their refusal was contrary to UK law.
Small story about Steam. They sold me a broken game, in UK one can return broken things according to the Consumer Rights Act, specifically including digital goods. Steam said, at length, they would not refund me: the game would crash (losing some settings) after ~30 minutes, I spent more than 2h of playtime trying to fix it [it's a 50h+ game, I'd have accepted an 8p reduction in my refund!].
I complained to PayPal. PayPal decided in my favour -- ie in keeping with UK law. Steam didn't dispute PayPal's findings but instead froze my Steam account (and I assume paid PayPal the money back). PayPal made me whole, financially.
My Steam account was blocked for a month or so. Ongoing they "punish" me by making it hard for me to give them money -- which is good for me, but my kids are not keen!
WhyTF would I complain over a few £. It's the principle, clearly.
It was very interesting to me to see how a big company can ignore the law in this way. But also spend what must amount to quite a bit of customer service time just to avoid a minimal refund.
All I wanted was a refund for a game Steam sold, that was broken and wouldn't be fixed. I did cursory searching for bugs before buying, but hadn't found this particular one before my purchase.
You know what I did with the refund money, bought the next game in the same series, because it was only the bug that I didn't like, and I paid more money for it than the game they wouldn't refund ... mad, eh!