Ouch that's a rough mistake. I'm sorry for your loss. Cryptopia has always been a fair exchange and great to deal with before and after the hack. Might just have to be more careful next time.
That's not true. Cryptopia have engaged in some shitty behavior in the past, just have a deep scan of the scams and accusations section.
The sad part is, despite what we all think ethically, they have in their legal right to deny service in such a case, will such denial hold up its end in the court if OP sues? Most probably not. But who'd sue for such little money? The OP needs to be geared up to sue them for hundreds and thousands, if not millions.
I don't think they have millions to pay out anyway.