I am now a prisoner of this school.

At least your Internet seems to be working, so that's a plus. I won't dwell on the point, but next time get a position at a nice clean English Centre and choose your own flat. Now you are there, I should advise you to make the most of things and not keep on complaining ,because it will upset you and upset your uncaring bosses. It will soon be spring, and the ablutions on the balcony may prove quite comfy with a nice breeze wafting through. Try and get one of the students to be your girlfriend, that will make the hovel more agreeable. Try and think positively-now, am I right or am I right?