"I've contacted the seller by PM and he/she replied me saying will contact the courier to try to clarify, and after a week with no news I've decided to share my experience."
As I am sure that the moderators have the ability to concur; On 13th June, I sent you a PM requesting further information and saying that I would get in touch with Hermes. On the 15th June, with no response from Hermes, and no further message from you, I was shocked to see that you had posted it on the board 'to share your experience'!
Of the options presented, it could be any of them, but as Loz says above, it's most probably number 3, which is why I was keen to see photos of the envelope to see if it were damaged, or even the same one as I had posted. This would have at least enabled me to push Hermes a bit more and try to make a claim on your behalf, but ultimately the package was delivered, signed for and accepted in the condition which it arrived.
I am not going to argue this out any further in public - that's not what this board is for. Everyone will have their own thoughts and opinions, and as I have said before, its just a shame that this has now had to turn into a public 'he said, she said' match when this could have all been sorted out amicably and in private.