Their email reply:
"Dear Shanyi,
Thank you for your email.
We are terribly sorry for the wrong delivery in your order xxx419D.
We are sorry but we would like you to send the wrong item back to us with the included invoice within 7 days of this email.
Please send it as gift to our address in Japan.
As soon as we have the returned one, we will ship the replacement and will refund the shipping cost to Japan by PayPal.
If you have any question, please contact us first.
We are sorry for inconvenience but we wish for your kind understanding in advance.
Sincerely
VOLKS Web Site Service Center"
I don't feel like taking this off you know.
Ahhh... Yes darling, I don't feel like taking it off you too >_< So I replied the email asking what if I find it troublesome to do as they asked and would like to keep this set with me. Aaaaaand so I shall wait for their reply once again! Feels kind of bad as I think they're really busy with emails from other ppl too asking when are their orders coming? Ohwell. *shrugs*