How much did you pay for an STi with 262km?
I'm curious because you still bought the car after you noticed the issues that cause your displeasure. You saw the excess power steering fluid and you still bought the car. Did you need confirmation? You, yourself saw the excess fluid!!
Now you want them to fix the car AFTER you bought it?!
Before buying, you asked for a trunk inspection. They said no. You asked for a power steering pump inspection. They said no.
YOU STILL PUT DOWN A DEPOSIT?!