I found a really creepy account that is for me

So, I was playing a random Roblox game when some time when I was playing a account named PirateBlank joined my game. He stood next to me and then tped somewhere else. Then he said this: I AM COMING FOR YOU PIRATEMAN4963 (pirateman4963 is my account) OR AS YOU LIKE TO BE CALLED JOSHUA

I was very scared because Joshua is my real name. Shortly after I left the game. Then I looked up his account and saw that it said HELLO JOSHUA

HELLO PIRATE MAN

I AM COMING

and the top part on his description it said

I AM COMING I AM COMING I AM COMING I AM COMING I AM COMING I AM COMING I AM COMING

I was freaked out so I stopped playing for 3 days. In that time I was talking to my friends about it. They didn't believe me, so I finally went back to Roblox and checked if it PirateBlank's account was still up. It wasn't. Well...at least I thought it wasn't. Oh and also before I stopped playing he sent me a friend request that I accepted and hoped that I would be able to talk to them about why they are dong this, and the HELL do they know my name???!! Anyways, long story short, I didn't get anything. All I got was a bunch of jumbled letters. Maybe someone will make something out of these? If you did, comment it down below: V NZ PBZVAT WBSUHN

LBHE ABG FNSR

TBBQ YHPX.

Please, tell me if you know what this means.

Anyways, I checked to see if the account PirateBlank was still up and it just came up with one account named pirateblankie. Oh wait. Now I just searched it up on roblox and he is there. That is weird. Well thats all for now.

Please, if you know what those weird letters mean tell me in the comments. It must mean something! Thanks!