This game sucks. There's no other way to say it. You need 86 stacks of everything to craft a needle, all while having both limited stacks and limited slots. Ah, and of course your armor will break after two hits. Oh, and your weapon too (?!). You will have to kill 5 high level zombies to get a single rag (sic). You need duct tape to repair guns (??) You need a certain type of scrap metal to repair everything ( why the h I can't use OTHER kind of metal?)
You know what's extremely weird about this game?
One day "YOU HAVE UNLOCKED THE DWARF!" --- Then, after ten minutes, you discover you have not, in fact, unlocked the dwarf. k
One day, "YOU HAVE UNLOCKED THE ELF!"
But... why?
I play daily: just yesterday I asked in chat when the next monthly task will be. Today I connect to game, open tasks "monthly task failed". What? It didn't even show up. And yes, I connect daily and always check tasks.
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Unlocks are permanent. I think you are referring to when the dwarf or elf are "Visiting" - which can happen a couple times a week when locked.