I would complain, and keep complaining. Rental laws are different in each state, I live in Arizona which is one of the worst states for rentees..We basically have no rights here, but whenever I had an issue I lodged a complaint, vocally, and in writing (keep a copy for yourself!) and kept doing so until things were addressed.
You shouldn't feel uncomfortable in your own place of living, especially when usually in a lease they are required to give you notice UNLESS there is a reasonable reason for emergency or lack of notice, however they word it, which from what it sounds like, is not the case here..
Sorry for the troubles, I know how that can be..utterly frustrating. And it becomes complicated with living situations like this, I know from personal experience from living in student living apartments..but same rules apply for basic rental rules.