Hi,I'm Zoey and I'll be assisting you. I'm reviewing your question now.
Do you know who made this purchase? Have you reported it to the police?
First of all, if this was an unauthorized charge, you must go to the police and fill out a police report. Bank of America is going to want to prosecute if they pay you back and will want to know that you would cooperate in that, if the person can be found. They will want a copy of the report.
As soon the charge goes through, like they told you at the bank, you should contact their fraud division and let them know about this, tell them that you have made a police report and tell them that you are disputing the charges. They will investigate and if they agree that you did not authorize the purchase, they will reimburse you.
Just checking in to see if you need more help or any clarification of my answer. If so, please reply here on this question thread.