I quit my job and went to work for another Franchise?

I quit my job to go work for another Franchise (Same company) because one of the owners would always cuss at us and demand us to do things he was verbally abusive to me and other employees that is my opinion. Anyways now I'm getting Facebook messages from the other owner telling me she heard from some people that I was talking crap about her. Then posted comments which I know were directed towards me because she even threw my age in there telling everyone that person is immature to be 30 plus and karma is a *****. Is there something I can do about this? I did send 3 emails back but never showed any signs of being as pissed off as I am because I think I might be able to hire an attorney. Please let me know. SN: I never wanted any of this to happen between us I left everything alone and never said anything in public or posted it anywhere talking crap about them or there company I just wanted to be in a happier work enviorment. I don't see the crime in that.