If someone ****s you then banks won’t assist you even though they have details of that person

I got ****med by someone using your account but I can’t get my money back because that person used all the funds. How did someone open an account but cannot even be traced? I got ****med by an Instagram boutique called the glam hair. I must now get something from court when I already opened a police case and affidavit. What’s the point of wanting someone’s details when they open a bank account if they can successfully **** people because they know the banks won’t do anything. They don’t even try