Now complain to the maintenance guy's boss directly. And his boss.
I would do this, except I work for the same boss...just in a different department.
You know what works for me to get things done on campus? Start CC emails you send about this to the President of your university. I had some maintenance issues which weren't being addressed, so I CC'ed a few emails I sent to the President and viola issues fixed. Take it right to the top, obviously the lady you met with wasn't in much of a position to give you any answers, etc. on this matter.
This actually is a good idea, methinks I will do that.