That's rough man. You're just gonna have to call them and work it out, sometimes that takes weeks. At least it did for my friend who's account was hacked. He did get it back, after his gamertag was changed 3 times with his money. The one gamertag he made was "CALL330547XXXX", only the last 4 numbers were real and his. So he got phone calls almost everyday, had to cancel his credit card and turned off his phone for awhile. So it could be worst lol. Also, where you phished? Is that still something people do haha?
This disgusted me. Thankfully there is a new article out saying a kid who did this was shot twice, lived and sent to jail for a year. He tried to use a taser on someone who was legally carrying a pistol, the taser failed and the man shot him. I'm not really on either side of the whole gun debate thing and don't care to talk about it, but hearing this made me feel good. Hopefully that's not weird.
Don't buy this. This is pretty overpriced. My PC (custom built) is less than $850 and I have a 660. Although my CPU is slower, 3.3Ghz, I could upgrade it past what's in the PC you linked for far less money.