Attention Era Staff.

[salesman]

You were a trial staff, you screwed up...should have been more careful.

Edit: Now that I've taken the time to read everything, it sounds like you're demanding your job back or else!!! Bull crap. Staff positions are not something that you are given because it's somehow your right. You don't deserve anything, you earn it.
Earn it by proving:
A. You have skills
B. You're trustworthy

Sorry, but you don't qualify.
just my opinion