I also imported a roughly $400 item from Romania. Was expecting a 30% tariff at most. Nope. $756. Sender says there is nothing they can do. UPS says that's the money I owe. They will send to collections if you go long enough without paying it. Reddit had no answers, and many are struggling with the same situation.

And now you know why DHL suspended shipments to the US for a bit. I think express (non-postal) shipments are being processed these days?