The exchange that you are transferring from may show your transaction as completed but this just means that that exchange has successfully added your transaction to the blockchain.
It does not mean that your funds have cleared in your Dacxi Exchange account.
Once your transaction has been added to the blockchain it can take some time for the process to complete. This is because different blockchains can require a varying amount of confirmations to verify the transaction.
You are able to use your Transaction ID to follow the transactions status on the blockchain. (How do I find my Transaction ID)
If you are still having issues with this please submit a request detailing the issue (include any relevant screenshots for clarity).