Guild Wars 2

by mistake i had my math wrong, and i made x3 the needed amount for “Old Tom”
https://wiki.guildwars2.com/wiki/Old_Tom_

i spent 442g more than i should have, now the question, can i revert the minis to the materials? or is there any way to undo my mistake?
somehow sell the minis? somehow exchange in some npc? help anyone!
i have 6 extra account bound Baron von Scrufflebutts minis worth about 75 gold each!!
can i get my gold back in some way?

You could contact the CS Team via the ‘Support’ link above/below and discuss the situation.

Good luck.

Looks more like 50g each.

Since you know what the wiki is you also can see that the answer is no.