Bank of America Credit Card Complaint

Bank of America Credit card department,

Identity theft / Fraud / Embezzlement Georgia

I was recently going through my bank statements after a charge was denied and I knew I should have had the funds in my account. After finding out that I had a fraudelent charge on my account I started going through my past statements and I discovered that over $7000.00 Had been stolen. I filed a claim and waited on a response. My claim was denied because they say my actual card was used in the withdrawals that took place. How can this happen? I know no one ever had my card in their possession. And it had charges from a casino and other states I have never been too. I want my money back asap.