I submitted my paper to a supposed editor for publication in a book. He never responded to the emails post my submission of the paper and upon contacting others from the mailing list I found out that they haven't received any response from him either.
A senior scholar suggested that I should partially publish the paper I sent so that I can save it from him stealing it. I did that and thought to forget it, but I just found out the supposed editor has a paper with my research idea in his list of publications. This person is now doing his postdoctoral research at a European university.
As a young scholar, I am feeling quite helpless. What can I do in this regard? Please help me.
EDIT: So upon reading the paper I can see that he lifted my idea and sources and tweaked it, my research paper was a literary analysis and he has copied my methodology and core text along with my sources.