I am going to echo others in saying that you should find another way to address this.
First and foremost, formally dropping/withdrawing is th best way of making sure that you have the option of returning in the future (and it helps financial aid and all that jazz).
It's also the best way of making it clear that your complaint not being heard is a cause/effect.
This is where, at my employer, academic appeals (for refunds, etc) start.
You spoke to the dean of the tiny campus...he was dismissive.
Time to speak to the dean of students or someone else w/ authority.
(and, regardless, use this thread, create a document that lists dates and times of incidents and details the incidents in a detached fashion--you may need it in the future))