亞馬遜包裹被退回（Unclaimed/Max Hold Time Expired），接下來(lái)怎么做？

客人在9月中旬下單，昨天說(shuō)要換貨，想回他信息，卻發(fā)送失敗：”We were unable to send some of the messages below to your customers because emails to their email addresses were bounced by their email service providers.”
看了下tracking，說(shuō)包裹未妥投：”Notice Left (No Secure Location Available)”（1個(gè)月前）；無(wú)人認(rèn)領(lǐng)，超過時(shí)間：”Unclaimed/Max Hold Time Expired”，然后快遞就退給我了。
接下來(lái)要怎樣？要收restocking fee么？