Customs Charges

I got a bill from UPS in the mail about the anniversary rings we ordered from Etsy.  Apparently we have to pay $84 for customs fees because they came from out of the country.  I had no idea that I would have to pay an extra amount on top of paying for the rings.  It's money that I don't really have, and I'm not even sure I owe.

I'll have to give them a call on Tuesday anyway, as it was due two days before I even got the letter.