Instagram stalker

What do I do about this, I need advice.

This man online was talking about a womans body in a disgusting way so I replied saying leave her alone. He keeps going and going and sure I probably should have stopped but I kept it going. Hes now bringing up my family’s names saying my father has 4 boobs, my moms name that she has a nice rack and about my brother’s girlfriend.

Hes literally stalking me. Now he said hes gotten people fired and other weird things for talking crap online. That hes going to have fun with this.

And then he blocked me on instagram. Now he has my information and idk what else hes going to try to do and im freaking out. I tried blocking him on Facebook which is where i think he got my parents names from, but i unblocked him to check his account and now it wont let me block him again.I have also reported his comments and reported his account on insta and Facebook but nothing has come of it yet.