I got scammed on kijiji, bought a fake Samsung Galaxy S6. What do i do?

So yes, I know I m and idiot for getting scammed and I feel stupid enough as it is. My Brother wanted a new phone and he found a reasonably price ($550) Samsung Galaxy S6. He couldn t meet up with the guy due to work and I had free time so he asked me to. He did his research on how to spot a fake phone but only briefly explained it to me. I went a picked up the phone for him downtown. I brought it back and now hes telling me the box is fake due to certain things that don t check out with the packaging. We haven t opened the box and I feel absolutely horrible, I don t know what to do. I know where I went wrong but I was wondering if theres anything I can do at this point. We ve just tried contacting the seller and were now waiting on a reply. Thanks.

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