請問我遵照這篇退費方式http://www.mobile01.com/topicdetail.php?f=563&t=1920795應該是之前扣款不成功所以現在無法退費它顯示"You have already a problem with this item or it is too old to be reported if you need further assistance contact iTunes support"我現在該怎麼辦呢?