Got eve-teased today at Rose Garden

So I was sitting there on a bench this afternoon. Suddenly 2 guys came, one of them sat beside me (really weird already) and the other one (standing) said to him “ek number hai poori” , and then proceeded to talk some other disgusting stuff amongst themselves directly about me and my body which I cannot mention here or tell anyone around me as well. Please note that I wasn’t wearing anything revealing, literally black pyjamas and black hoodie, I’m just a 19 year old young girl for fuck’s sake. I just left the bench then and changed my place. Feeling really horrible since then, hands still shaking as I type this. Anything I should do next time in this situation? Just “walking away” felt really weak from my side tbh, I never thought I would silence myself and not even teach these losers a lesson, when on social media I am so active, vocal and bold about standing up for what’s right. This is not me.