Sorry your stay wasn't satisfactory! As stated in the manual, the heater is controlled by the building and not adjustable. We recommend you crack a window or use the AC. I am not sure why you were un able to open the windows, they are not locked and the latch is clearly visible. Also, we are available by phone, text, and email 24/7 if there are is anything wrong during your stay. All have to do is contact us and we can remedy any problems you are having.
Thanks for staying with us and if you chose to stay again, let me know and we can offer you a discount.