Food Safety Reports: Subway, Zelny trh, Brno-Brno-stred, Czechia

I went to subway on Tuesday 12.12.2017 and ordered eggs omlet with slide cheese m.. the problem started in the afternoon with multiple diarrhea and severe abdominal pain followed by nausea,, i took medication and Is getting better now i still don't know how to report to authorities in this country  | Symptoms: Diarrhea, Nausea, Vomiting