Rov 2-3 cannot complete help please.

[Dragoy]

Is the actual name of your current mission Call to Serve?

What is your current Chains of Promathia mission?

The Mog Locker will never be emptied in the event of not paying the rent, it will only become inaccessible until paid for again.

You might try

/itemsearch "Cipher: Prishe II"

to easily make sure it's not hiding in one of your storages (spelling should be correct, but I don't have the cipher to try right now).

If it has been dropped, you should be able to get it back via a Mystic Retriever near any(?) of the Trust Magic NPCs (for example: Clarion Star at (K-7) of Port Bastok). I don't think it would affect your progress however, since you would have been able to receive it to be able to drop it.