This is a little confusing, but I'll try.
- If you withdrew from livecoin to deposit in cryptopia ( livecoin => cryptopia ):
The transaction should be on the blockchain if livecoin have had no issues. I would open a ticket with them. It will help them to know that the transaction is not showing in the block explorer - If you withdrew from cryptopia to deposit in livecoin ( cryptopia => livecoin):
There is a good chance the transaction has not been broadcast to the network as a result of cryptopia's wallet being in maintenance.
It will be broadcast to the network when the wallet is re-activated.
Many of us have dealt with both these exchanges, and found them both to be forthcoming, responsive and very technically skilled. I think I would excercise some patience and do your best not to panic. Sometimes these things take time to get worked out.
Note that because this is a transfer between exchanges, you really do have some very good people working to sort it out.