The telephone may wait for 20 minutes or more.
Call charges are customer's payment.
Rakuten Ichiba Customer Support Center(japanese)
Phone number: 050-5838-4333
Reception hours: weekdays 09: 00-21: 00 / Saturdays, Sundays and public holidays 09: 00-18: 00 (open all year round)
If you can not speak Japanese, press button 9 after 050-5838-4333.
It is unknown whether Rakuten can respond to english inquiries right away.