Help me Gameflip pls!! :D

So I was looking for a good price on rocketleague items, then I saw this guy who was selling his inventory.
I just bought it, and then after I saw that it already was sold. It was 11$ and I think I just lost 11$ for no reason.
I dont know, if I could get a refund or?

Pls help me out, thanks!

Hey, can you send me via PM your invite code so I can check your this for you?