Bought a used PS3 (craigslist), wanting to get my money back, BUT...?

okay, here's the run-down. I bought a used PS3 on 10/08/2012. I realize that a fair amount of time has passed, but I've had no time to do anything about it prior to this. the original craigslist post is gone now, but he said it was functioning. when I questioned him about it not working (2 days later on 10/10/2012, had tried texting him the day after [10/09/2012] but got no response, PS3 wouldn't take games, serial code was missing, blu ray drive not functioning [be it the laser or the drive itself, i'm not sure]), this conversation happened:

me: this might be a stupid question lol but i can't seem to get any games in. am I missing something here?

i'm not pissed or anything i'd just like to know if you knew about the issue, or if a game got jammed or something and you had to take it apart to get it out. i'm fine with trying to fix it myself but i gotta know if it was causing any issues that you knew about so i can try something. don't have the money to take it to a shop so i've gotta mess with it myself. so e-mail me back if you can. thanks

him: I hit up the guy he said he opened it to get the game out that's how he fixed it

me: well it's not exactly fixed. when he opened it up he must've knocked something out of place because it won't take games at all

him: o well I didn't know that it took my game with no problems when I was playing it I tried it once it if u can open it try

A month after that (11/03/2012) I sent him an e-mail in regards to a possible refund. we'd had a conversation through text after the e-mail about it not working, and he told me he would get the money back for me. suddenly, the person I'm texting tells me that it's not that person's number anymore, this is his friend, and that he changed phones. I asked for the new number. no reply.

So, I'm stuck here. I was told I was getting a functional PS3, was not informed of it being sold as is, was promised a refund, and here I am, 7/28/2013, STILL without my money. Is there ANYTHING I can do about this? and if so, will it cost me even more money to forcefully get it back? I've sent him another e-mail and am awaiting a response, but honestly, I'm not expecting one. I am not sure what to do now. any advice would be GREATLY appreciated.