I've bought items from Amazon Japan before but I never have any issues unlike what you've faced o_o
I don't know what you plan to do right now as the way you've said in that Amazon Japan's customer service ain't helping you out in any single way but if I were you , I will head Utena's advice & just cancelled your Amazon Japan order
YesAsia , HMV Japan & CDJapan all still have stock on both the Blu ray & DVD editions of the boxset so maybe you can consider it ?
