Long story short - been working at one place for one and a half year, decided to quit because of the increasing abuse from employer. He is a very sensitive, artistic type of guy, very girlish bodied, who likes abusing his employees, calling them idiots, retards, mentally ill etc., asking who needs to be beaten up and the last bit was him saying some bullshit about my girlfriend/soon-to-be wife. He has decided to keep a lot of my earned money to himself (around 700€) meaning I have been working for ~0,80€/h for the past month. I have earned that money by working 200+ hours every month for the past few months and we need that money for studies.
The only thing I know I could do to him is get some bad reviews for the place on its FaceBook, TripAdvisor and FourSquare pages, since he got really upset everytime some client with special needs posted something negative online.
Do you guys have any suggestions what I could do or who could help me damage his companys online presence?