You should contact an attorney, and if the charges on your credit card are truly illegitimate, you should inform your credit card company that you are disputing the charges.
Is your friend chubby with a big beard? Did a naked asian man attack you that night?
Seriously, since you used your credit card, you have the ability to dispute the charges. Contact your credit card company immediately and begin the dispute process. Hopefully you are not past the time to dispute the charges.
Pearson Law, PLC