Serial Key lost - PC formatted

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Hello Forum-users,

First of all i apologize for my english, i'm german

A week ago, I formatted (is that correct? I mean that I deleted all data + microsoft)

Yes, correct.
Although you can't delete Microsoft (it's a company). I wish you could though.

Anyway, to the questions:

1.Is there another way I can get the serial key?

PM either Thomas or Jens.
They should be able to help you out.
You probably need to send the name, email etc. so they can actually verify you bought it.

2.If not, would someone of the Frictional Games Team give me a new game?

I don't think they will give you a new copy.
Although I do think you will be able to recover the lost code.

Edit: Oh, Ninja'd.