Now they refunded the failed withdrawal, I proceeded with another one, and also this one shows as "COMPLETE" with txid, but the txid is not present on the explorer.
I have had several mishaps with CLAMs on Poloniex in the past, but this time is starting to get ridiculous... And yes, replies from the customer care team are void of useful information.
I've also experienced it like you, and I don't understand what really happened, I sent a ticket to their team but there was no reply at all maybe someone can help me here
I'm also starting to get no replies from the support. And my CLAMs are still in the limbo. I don't think any help can come if not from Poloniex itself, but they seem not to care much.
But maybe the experts here could provide some speculation on how it can happen that Poloniex got and provided us with a txid, but the transaction doesn't even appear on the explorer: That's a complete mystery to me!