Ammonia is the answer. Pour full strength on a section of floor. Wait 10 minutes and then use a mop/with scrubber to remove wax. Clean up floor with soap and water,
Son's Stupid Girlfriend Waxed A No Wax Floor. How To Strip Wax?
Do what guest mentioned and warn her to not wax a no wax floor
Go somewhere like Ace Hardware if you have one, or call a flooring place and see what they recommend for you. Hope this helps, don't let her near the floor again.