@Jens-Oliver1 If the listing showed pictures of a room with windows, but you were placed in a different one than shown, you can asked to be moved to the room that you booked or refunded if that isn't possible.
But otherwise, probably not. Airbnb doesn't require all rooms in its listings to have windows, and it doesn't care whether local laws regulate that. So unless your rental was literally not the one shown in the listing, you're not getting any money back. And if you completed the stay, of course you don't get to have it for free.