Do what I did....GO ON STRIKE.
I bought a box of black trash bags. Every time things were left out, I put them in the trash bag and hauled it down to the basement. When anyone said "where is my...." I would state that the new cleaning lady put it in a bag in the basement. This included dishes, utensils, clothing, chargers, mail, and anything else that was not put in it's place.
Boy-o-boy, that really worked. With that, I refused to do laundry, cook, or clean dishes and I stopped going grocery shopping but only for what I cooked FOR MYSELF. Soon enough everyone got on board. Yes, it was incredibly difficult to live that way, but it was certainly effective and solved the problem.
Desperate people do desperate things and this was one of those times that an unconventional method to get everyone's attention really did get their attention.