We can’t control what’s happening on the blockchain. If a transaction happens and gets enough confirmations from bitcoin miners, you’ll receive what was sent. If it fails, then you won’t.
For example hzdevil (above) complained on Jan 30, but even now the address shows that no transactions happened. If no transaction happened, we shouldn’t be surprised that the tokens haven’t arrived. And by the way status COMPLETE doesn’t mean that it’s complete. It’s complete when the blockchain says it’s complete (6 confirmations + a link to a blockchain explorer would be a good way to claim that).
Everyone needs to ensure the transaction happened and received confirmations. If this hasn’t happened, there’s nothing to investigate.
See this:
Edit: in CP slack someone mentioned that Poloniex moves funds several times during funds withdrawal process and that this takes quite a few confirmations, so COMPLETE in the Poloniex UI probably means one of internal steps has been completed. In that case one has to wait for the rest to complete as well and that can take some time and require that transaction is funded enough to be processed by the miners. Everything above still holds - this edit is only a possible explanation for the internal - “internal post-public blockchain workflow” when withdrawing from Poloniex and “post-public” workflow that happens inside of Poloniex when funding your Poloniex account.