maintenance company

Two things troubling me now.. I need to get an appointment with the maintenance company to check and fix the airconditioning,which sometimes runs right and sometimes doesn't , so sweltering in the house is not comfortable.But my job schedule is screwing me, and it's hard to fit them in..This is...

Now I have an airconditioning issue. The air goes on, but the temperauture stays the same. I have a contract with a maintenance company, but they give a range of 5 hours, and could pop up at the beginning or end of the range. Which would be adventuresome with my work schedule.Also, it's covered...