I want to make a complaint about my accommodation (private accommodation) to get their rooms looked into, as half of their rooms don't have an opening window, just a big glass panel and the same goes for most of the kitchens (in my case). I have been very ill on and off throughout the year, which is definitely due to not being able to have fresh air when I like and breathing in my own air, thus making me more ill when I have been bed bound. They have a 'ventilation' system installed into every room, which has never worked and they won't fix, but this supposed system doesn't even do anything when working anyways - they claim its meant to exchange the room air with outside's air but its not true.
Anyways, who can I go to to complain about this?