Is Cryptopia active again? How did you find the deposit address of cryptopia if they were not active yet.
Nothing can be done now other than waiting for cryptopi to come online and request support team for refund your money.
They have enabled trading too if I am correct. Maybe OP sent the fund to the previous used addrress. If they want, they can give it back, at least for the sake of customers satisfaction. I will follow this thread and will not use cryptopia anymore if they don't solve this issue.