Eh, I don’t think the system was ever supposed to work that way. You pretty much just paid for the Dungeons twice.
But you’d likely need to post on a help forum for even a chance. Depending on how much time passes between paying for the Dungeon Pass and the Deluxe upgrade you may have less chance, if your chance is greater than zero in any situation.
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Well it was less than a week between purchases. but there's no way to refund silver to my knowledge.