Customs fees and other import duties or taxes are charged by your local government, and not by HobbyLink Japan. We cannot offer refunds or compensation of any kind for these fees; the customer is responsible for covering any fees incurred.
For more information about import duties and fees, please see this article.
Please also consider contacting your local post office for information about your country's fees. The more you know, the better you will be able to manage your shipments in a way that works for you.