If I was a victim of fraud, and the bank filed fraud accusations against me: Would I have the basis of a case?

Last year I had the unfortunate experience being a victim of a fraud/scam. I immediately let the Branch Manager know at BOFA. She instructed me to get a Police Report and that point, I took action to assist in apprehending the perpetrator by involving Miami-Dade Financial Crimes Unit by continuing correspondence with the perpetrator as well as Det. Garcia in retrieving as much info as I could to not only capture this criminal but, to make my case to BOFA that I was the victim. After numerous phone calls and waiting times, I finally reached someone at BOFA that told me that I was responsible for the fraudulent activity and that my account was frozen. I then opened another account at BB&T which was also frozen and I was referred to "CHEXSYTEMS". I collected over 150 pgs of documents and mailed it off. I received a consumer report but no word on my dispute. I've had to resort to a pre-pay bank card to handle my day to day finances and have had extensive hardship since this ordeal.