David Pack promised he would pay off my credit cards in exchange for virtual company, then took my account information and scammed me Oklahoma City Oklahoma

David Pack messaged me on an app called Sugar. We spoke using the app kik, where he is still active. He has used multiple phone numbers over the course of the last 6 months to contact me. I supposedly spoke to two of his financiers, one of them increased my credit limit without telling me, got my account hacked, and then the bank closed my credit card and my checking account and told me I was no longer welcome to be their customer anymore. He payed off maybe two or three of my credit card bills before he started asking for things. He then started asking me to buy gifts for his sister and daughter in Texas (iPhones), pay off their phone bill, and continuously asked me to purchase him iTunes cards so he could convert them to cash, all with the promise of paying off the credit card bills. The payments stopped going through and then his JP Morgan account was frozen, and later closed. He left me with about $8,500 worth of credit card debt and Bank of America does not understand that these charges are not mine, even though the account was originally closed due to fraud in the first place. He has not returned my messages or calls in a few months