I am responding, and you didn't "lose" the BTC, it was on your own risk as you were aware of the likelihood of a seizure.
This would be a little problematic. From your original post in your thread:
Smokers, rejoice!
Cigs.eu now accepts Bitcoins! We ship cigarettes from Eastern Europe and
guarantee worldwide delivery!
From your money_back_guarantee page linked in that post:
Concerning the delivery, every country has its postal regulations that allow the buyer to refuse the delivered package and return it to the sender free of charge. Our 100% Money Back Guarantee covers this and we will return your money back in full in case we receive a refused package back. We cannot guarantee that import duty taxes will not be charged in every country. In cases when payment of duty taxes is requested, the buyer is always free to reject the order and ask for his/her money back. Money will be credited to the credit/debit card used to purchase goods on our website as soon as we receive the refused package back.
Other than the lack of any mention of Bitcoin, it would seem you're on the hook to refund.