There's no other choice, since the funds have already been released outside by Binance, they are no longer accountable to it.
Just as I've said about the past experience of having the same problem, you're lucky if poloniex will help you to retrieve back your fund.
I am really sad about of it. I dont understand why support dont recover my bitcoin. Now live chat mod. told me that T3 support working on it. I dont understand what is T3 support. I think maybe they lost this private key. Recover Process is very easy and my bitcoin on their pocket... They delisted OMNI Network from Poloniex, they removed my OMNI USDT wallet from my account. If they will dont Use this OMNI more why they dont give me my USDT wallet private key. If I got this private key I can recover my coins in max 2 hours. I many time wrote to TETHER comany also. Their support replied me that 200 days is too long for this process... But they can not help me, they wrote me only Poloniex can help me.. As a result I got nothing..
(( I try to forget this btc but I can not because 20k $ is good amount for me..
(
It's truly a sad event when it happens to someone.
We don't know how they're taking that difficult if the fund was deposited to them. Because if they're caring for their customers, it's easy on their technical end to just release it if it's proven that the mistake was done.
On the other hand, they'll only say that it's our negligence upon doing that deposit. I'm hoping that they'll still email you with good news soon since this is really a big amount that you've got.