Here's the story of what happened in my prospective seeming that you did not tell the truth in some parts.
Firstly, it starts off that me and SilverSnake are coinflipping (Not highest number wins, no idea why you said that in your appeal) a Portable EMP so as I was typing "/roll 2", I said in voice chat that I am going for 1 meaning that if the coin flipped is 1, I win the Portable EMP as you can see in the screenshot below.
SilverSnake then refuses to give the Portable EMP after being given multiple warnings to hand it over otherwise a permanent ban would be placed which was then done so by me.
I may have the recording however my microphone was muted so the recording won't be useful unless if someone around the area at the time who was watching the coinflip does have evidence.