If you have those proof, you could ask those site that offer those item to and show your proof that the item you purchased was a fraud, and the person who redeem it is the frauster. You could some what have a case but... from what I understand, Steam will do $hit about anything like this. Usually your bank could refund you, your money back if you file a fraud claim and they will charge back on PayPal, paypal will be forced to charge back on the person who use it. usually the person who use the code get ban by warp portal as they are at the receiving end..
I called them already and there is nothing I can do. Also, to file a complaint, you need sufficient proof in which I don't have (like I said, he kicked me out of discord). They can check who used those codes, definitely it's not me. last thing I can do is call steam and that's what I will do right now. This case will unlikely get resolved and I just have to call this a loss and take it as an expensive lesson.
The person here is correct, this has more to do with discord than this game. I'm giving up, I'm taking this as an expensive lesson.
Don't you people tell me i didn't get scammed because I did.