I visit one school where i get no prep time and i teach all 6 classes myself, plus a class before of.15 min as a intro to English.

What should i / can i say to my dispatch company? The next day i teach 5 classes at ES, and i have done one week and feel pretty tired already and a bit depressed.
I have to repeat have to eat with students, its on my schedules time, and i must clean, Kocho sensei comes around to clean near me and i cant be just sitting there.

Thank you