Sorry for your lose man.It is exchange who responsible for your lose as you're the buyer. You bought something that doesn't even exist in their wallet,but database.
I would like to suggest that you should take immediate legal action against cryptopia as its clearly understandable you paid them 2 btc for csc coin,but they didn't deliver/refund you . Drag them into the court in NZ.

I'll close my activity in their site from just right now.