Can I seek legal retribution over rumors?
What kind of rumors are they?
That I was a bully and an asshole to them
It's wrong to seek legal retribution over rumors.  It would clog up the legal system and it probably won't go anywhere.
I just want justice to be done.
I can understand you want to see people punished but usually people do not use the legal system to sue over rumors since it is hard to prove that the rumors affected your life.