Can you refund a crown purchase in ESO?

I'm curious to know if it's possible to get a refund for a crown purchase made in Elder Scrolls Online. I understand that crowns are the in-game currency used to purchase various items and services, but what happens if I make a purchase and later decide that I want my money back? Is there a specific policy in place for crown refunds, or are they generally non-refundable? I'd appreciate any clarification on this matter.