[mothered]

Okay, and what is the SNAD method? Can I use it in my case?

It's not a method.

As said:

The only thing that you can use via PayPal Is SNAD (Significantly Not As Described), which Is the equivalent of the wrong Item received method.

Couldn't I try an EB despite the high weight?

You can try It, but don't be disappointed If your claim Is declined.

I don't know if they have cameras in place, but it's enough that they are careless and don't investigate and it could be fine.

Never assume their assessment.

Besides, who's to say the delivery guy didn't just open the package when he got out of the truck after the scan (I don't think there are any), and steal the pair?

Do you really want to put blame on the carrier driver?

So my approach would be, my little cousin picked up the package on my behalf, I have not been home since, I only opened the package now and there was nothing... I recall that it has been 8 days since I received the item.

Keep us updated.