Fortnite: old / abandoned battle pass? Challenges?

I bought the chapter 2 season 1 battle pass. So with alter ego challenges etc. But it was not possible to complete all tasks.

Is that all gone now or is there still a way to get the skins and stuff?

Yes you can continue to face the challenges!

And how? Will I get the skins too?

So if you haven't got to the last skin you won't get it but you can always face challenges