I have the exact same problem with starlings and although I have contacted the owner of the building, they wont do anything about it. It drives me crazy. I lie in bed at night and it sounds as though the little swines are playing catch in my attic. Because I don't own the building, there is little I can do about it, but perhaps this falls under the heading "pest control"?
Sorry, that wasn't any help, but I just wanted you to know that you aren't the only one with this problem.