Skoshi 400euro is not much???
That's almost as much as I spend in a month, and I pay 260euro for rent, ~17-18m2 room.
Oh, and I don't get anything from neither my government, nor the dutch government (which is sort of obvious and logical, since I'm a foreigner.)
But even dutch and german student don't get as much per month, dutch students get around 200euros monthly from the government.
One more thing, tuition fee is to be paid here, books are to be paid as well - about 200euros every 2months.
So I think that 400euros is pleanty, if you pay 220 for rent that should be about enough for a month. Especially since you don't have any other expenses (such as books) than food.
One more comparison, Hungary. Rent for a student(room) is about 150euros, you know how much students get? (And not all of them, only if you have above a certain average result.) About 20-30euros per month!!!