"Dear friend:
Sorry for any inconvenience,
for you question.
you can send it back for repair.
please send the item back to the following address :
[Indirizzo]
PS: Please keep other accessories yourself and just send the earphone back. Also you can use the second-class airmail which will be much cheaper.
Please pack it well and write down your ebay ID so that we can check it
conveniently .I will give you the update news once it arrives here.
Best wishes."
Scusa per la typo, intendevo "airmail".
Dovrebbe essere questa:
http://www.hongkongpost.hk/eng/postage/overseas/air/