This creep keeps following me!

So I am 14M and I remember I was at a nearby cafe having a filter coffee. A man came and sat next to me, he looked a bit scary but he seemed pretty normal. We soon started to talk and he told me, his name is Diddeshwar Prasad(not sure if he lied). We started chatting on Insta, and he sent me a pic of his pipi, I ofcourse told him not do that but he sent another one, so I blocked him. Now, Whenever I leave my home, I see this guy.... He keeps following me, whereever I go.

(Nothing serious, Just a troll)