Why can't I buy MW2 for PC?!

I already redeemed it sadly... Did not use it yet.

It seems so stupid to me that it is available on Xbox but not PC through the same store... Just is so unprofessional..

I will start a chat tommorow but i think 50 euro is through the drain, atleast Ive learned to stick with Steam now :')

Besides; didnt Blizzard buy Activison and Microsoft Blizzard?

You'd have to ask Activision regarding the availability.

If you've already redeemed the gift card, it is no longer possible to receive a refund for it. If you haven't redeemed it, you would have to contact the retailer you purchased it from.

I know it is available on PC, what I did not know is that the Microsoft game selection is so poor that it doesnt even have the top games. I assumed a big company like Microsoft had the game when i checked if it had a pc store. Why is it available on xbox and not PC?

And have i wasted 50 euro now or can i get a refund?

The game is available for PC, just not through Microsoft.

I've come across a post you made: https://answers.microsoft.com/en-us/xbox/forum/all/refund-of-money-in-microsoft-account/4239d2c6-7e81-45dc-a8e6-ef88fd94b3c5

Is it possible if I bought something with my balance and then refund it to get refunded in a gift card for example? I don't necessarily need to get refunded in money. If a gift card is possible I would be helped tremendously!

No, it would just get refunded to your account balance in that situation. Refunds always go back to the original purchase method, in this case your account balance.