Creepy guy in delhi metro.

I want to put this off my chest. I (M) first year college student, was traveling in the blue line metro to this college for some competition today. The metro was very crowded. This middle-aged man with specs comes in and stands behind me. I was holding the pole for the support, he placed his hands just above my hand and eventually started getting close to my hands. Now his hands were touching mine; I assumed it was normal and didn't mind, but then he covered my hands with his (like holding my hands). I was dumbstruck, didn't know what to do, and tried to ignore it, but it didnt stop. I cud feel his d\*ck and that jerk was tryna rub it on my back. I tried to move and resist but couldn't as the metro was quite crowded and I was basically stuck there. It was quite scary for me. I took my hands off from the pole to show I was not interested, but he still didn't stop and was tryna to touch me again. This is the 2nd time I have faced this in delhi metro, and I feel so bad for the girls (not cus of this incident but as I have my own sister as well and female friends). I was scared to raise my voice or to do anything as I could not process. So guys, please stay safe.