Big Dog Pawn and Jewelry they go by maddogpawns on ebay to sell merchandise They sold me broken xbox 360(it's not the first time) and wont do anything about it, kicked me out of store, Internet

I purchased a Xbox 360 from Big Dog Pawn about 3 months ago and it worked great for three months. It got the red ring of death, and i went back in to the pawn shop to see if they would do anything. All they were willing to do was sell me another Xbox. They said i could fix my xbox by sending it in to microsoft but it took a month. So i purchased another Xbox 360 from them for $181.25 which wasn't that great of a deal. I went to plug in the xbox 360 and use one of their tvs and the guy said he garaunteed it worked, so i just left with it. But I should have tested it sure enough cause the power cord wasn't the right cord, and wouldn't even fit into the Xbox 360. I called up Big Dog Pawn and they were angry and insisted it wasn't so, i told him he would be seeing me soon.

So I tried to fix the problem and i called microsoft and it turned out that it had to belong to a different xbox 360 cause they made 2 different xbox 360's so i had no choice but to go down there now(cause a new power cord is $100). So i went in there and everything matched up with what i was sayin, and they said they would look at it, and let me know what they where going to do with it. I came back a week later and he said it was broken and needed to be sent in. I told him the whole reason i purchased the Xbox was to play while my other xbox (that i also purchased from them)is broken and getting fixed, i dont want to buy another broken xbox. He started yelling at me sayin to take the xbox and leave and then he acted like he was gona throw the xbox outside. He was yellin f you and f this and that. I was calm but in tears through the whole ordeal. What can i do will you please help me?