Guys my Cryptopia Account got hacked and all my coins got sold and stolen... by a user called kagevu... what can i do?

I'm so sorry for what happened to you.
I think there's nothing you can do about it if all of your coins already lost.
Let's make this a lesson, next time use 2FA, different emails and unique password so that your account more secured.
I hope for the best for you, then.