Earlier quoted context omitted.
You could consider filing in small claims court.
toast0 suggested a chargeback as well; both seems like great mechanisms to encourage a refund. Thanks for the suggestion.
But if you get a court order for Apple to take some specific action (like a refund), I'd think they'd be less likely to retaliate since you could presumably bring another (legal) case against them that their retaliation was shady.
Then again, I don't know about laws where you live, so maybe this isn't a consideration.