Do you have any other proof that cryptopia stole your coins?

I am still using this exchange site and until now I am holding few coins there.

Let me know if you put 2fa enable because I heard that there are traders hack their account without 2fa enabled.

Now I enable my 2fa and I think until now I didn't experience any issue of using their exchange what I mined from mining altcoin I exchange it to cryptopia and didn't experience any problem as of now ... Better to try to contact support on facebook page of cryptopia or in other social media because sometimes they are answering my question on their social media page.

Check this facebook page https://www.facebook.com/cryptopiaexchange/ for twitter https://twitter.com/Cryptopia_NZ

And hope that they can answer you fast.