Damn, this is no small money, op I can't imagine what you must be going through at the moment because this really sucks, especially seeing that no help is coming from any place, my question is, shouldn't binance have a plan for case like this, after all it was their api that was used, there should be a way to resolve or at most block a wallet with such incidence so that the hacker don't go free with such money, very disappointing that both binance and tether don't seem to be able to help.
after a lot's of search I found this : Etherscan Phishing Form
https://docs.google.com/forms/d/e/1FAIpQLSf8vsYLkm8QA8il615yS0gqCNmWWfLArFM1o4-R5xmV-0fbYg/viewformjust to report that you lost your money and you must prove it , seems its just for phising