ShadowPrincessD, I am so sorry this happened to you

I don't really have much to add to the advice of others, but really I feel so awful for you and so angry at those who prey upon others.
I will say that I use the authenticator on my phone, not sure if they can hack into that as well, but it is another security wall.
I hope that SE can restore your losses - not sure if they do that, but I hope it happens for you.