I screwed up and now my Peachy Butt Girls is sitting in post

I ordered my physical copy of peachy butt girls, and it shipped on May 5th. The only problem is that i moved around the same time, and was not able to update my shipping address for the book in time. I forwarded my mail and assumed it would be properly forwarded, and just waited without checking the tracking number again since it said it would arrive around may 26th.

I completely forgot about it, checked it today...USPS has marked the order as "vacant / undeliverable" and seems to have shipped it back to portland :(

How screwed am i here? will i have to pay for it to be shipped back to the right address? I was really looking forward to getting it since i bought the original Renai Sample release and was really happy with it

Im not sure how to properly contact fakku support so im posting this here hoping someone can point me to the right place