If you need to see the confirmations required for a coin deposit, it can be found on the CoinInfo page
Select the coin you are interested in (ie ETC), click "Settings" in the side panel. The confirmations Cryptopia requires a coins network to provide before the deposit is credited to you account is shown beside "Deposit Confirmations:"
The amount of time each confirmation will take depends entirely on the coin network and Cryptopia has no control over this. When sending BTC ensure you are paying an an appropriate fee at the time to its network to avoid delays.
If your deposit has reached the required confirmations on its blockchain but has not been credited to your account, you should open a ticket here https://www.cryptopia.co.nz/Support and provide the TxID or link to the deposit transaction on a block explorer. Please also remember to close your ticket if you receive your deposit before a reply is received from support.