Finally I bought a “used” H9 Max from a guitar store and they sent me a “H9 Core” in a H9 Max box.
Now, the situation is suspended and the store, I think, is seeking for some solution for that.
They have a lot of used ones there, and I think there are two reasonable solution for this situation; either they will reimburse me $ 220 for an upgrade to Max (Most suitable solution:) or maybe we can make a firmware swap with a Max in their hands. (I am not in the Us now so sending the pedal back is not an option)
Can the firmwares of two pedals be swapped? What do you think?