UCC 4A-202 is your friend here. It establishes that a bank can only charge the sender for an unauthorized payment order if it proves the security procedure was (1) commercially reasonable and (2) the bank accepted the order in good faith and compliance with that procedure.
Key arguments: (1) Was there a callback procedure for high-value wires? If yes, did the bank follow it? (2) Did the wire go to a first-time beneficiary? Many banks' own policies require additional verification for new payees. (3) Was the receiving bank in a known fraud hotspot?
Also: immediately file a "recall" request through your bank — they'll send a SWIFT message to the receiving bank. Time is critical. If any funds remain in the receiving account, they can be frozen. After 3 days, recovery rates drop below 10%.