[kyungchul]

I saw one their website that, if my package does not arrive within 48H after being marked as delivered, to contact them.
Unfortunately I also read that "We recommend either a work address or someone present to accept delivery. Levi's® does not hold any responsibility for items which are lost or stolen."  So I supposed PEB is the only option here.

Sometimes the terms and conditions say one thing, but the company does another. Though I can only vouch for their customer service in the US, I have personally DNA'd Levi's numerous times with no pushback whatsoever - including multiple packages delivered at separate times on the same order.
Levi's is vouched for pretty regularly with DNA - and PEB - so it would seem that despite their terms stating this, they tend to lean towards making it right for the customer.

Not that you shouldn't proceed with caution and do what you feel comfortable with, or that TOS isn't useful, just wanted to chime in on Levi's specifically.