I can feel your pain, since I have walked in your shoes. Yes, mine was for a different amount, but we trusted that the bank did way they told us they did . . . verified that things were good and clear . . . but they still held us liable.
I would find a good lawyer, document everything, and report the scam to the places listed here
http://scamvictimsunited.com/Reporting_scams.htmAlso, we should bring items like this to the attention of our law makers. Have them change the laws so that the banks have more liability. We have a petition on this topic, and you can find the link to it in my signature.