I had a breakdown in Delhi metro.

What the f*ck is wrong with delhi metro, specially yellow line. I experienced another sexual harrassment today. I was in ladies compartment which was completely filled with males. Extreme rush so I could barely breathe, let alone moving around. I was standing and there was a man behind me. He started rubbing his d*ck against my back, like "there". I could literally feel it. At first i thought it's some kinda bag and all but when I felt continuous weird sensation, I turned around and guess what, he looked straight into my eyes and then started signalling towards his d*ck, it seemed like he's saying "want it?" And omgg I started crying on the spot. I mean I had a panic attack and couldn't speak, couldn't move, couldn't do anything. I looked forward and down and tears were rolling down my cheeks. And the moment I collected courage to shout or smthng , his station came and he literally "ran" outside. I had similar experience some days ago too in yellow line itself. A middle aged man was touching behind my back continuously. Wtfff is wrong with people. I'm so annoyed and frustrated and feeling so helpless. How do I travel by metro without being harassed?? Is there a way???