I was scammed!!!!!!

[Blu-ray Fanatic]

Today at work, this nice looking SUV pulled up and some dude convinced me to buy their product. Of course, I looked at it and it appeared very nice. He even showed me some invoice and told me some story about he got more than what he asked for and offered me a deep discount of $350 for a so-called product worth $1999.99. I was stupid enough and bought his advice along with the surround system. Him and his partner-in-crime even followed me to the nearest ATM. I took the money out and ACTUALLY paid those scammers. They scammed me at the right time because I was in the market for a surround system. Well, I got it! Its a cheap ass system worth $50 or so.

What should I do with it? I haven't opened it yet and I definitely want my money back. Why wasn't I aware of this scam?