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it is difficult to judge whether you should ignore it or not. this may be the reaction to the other party's action from 'their' paypal, which sounds logical (S. Korea, so paypal hub in Singapore). if you ignore it, it may be challenging to say later on, "well, I did what you told me over the phone rather than what you told me to do in an email". do you have a name of the person you're contacting in paypal, or like their supervisor or smthn?
others may correct me, but i'd say reply to the Singapore email with detail of whatever happenned so far (briefly) and the content of the telephone conversations, plus the fact that you already shipped it back.
what do others thinks, makes sense?
'Protection services', wtf is that? Can you look at the actual sender details? Not just the email content but the header? Do you have a computer lol? I know, people don't use computers to view emails these days, I don't :)
The email does look very wierd