Basically there was this guy (not gonna say name) that hosted a custom game called 1v1 win for skin and he was in gold and i was bronze and we started the match and he went 
and i went 
and i beat him and i added him and they accepted it and they sent me a messege then blocked me and never gave me the skin
what do yall think about these kind of liers
You can send a ticket into support regarding this. If you can demonstrate that the player has been deliberately doing this to scam skins out of people (or rather, demonstrate to Riot that they should investigate for themselves that this is happening), they might take action.
From TOU, Section 5 viii. Participating in any action which, in the sole and exclusive judgment of Riot Games, defrauds any other user of the Game, including by scamming or social engineering;
Meh.
Don't really care.
Kinda sounds like he might be scamming people? There's no binding agreement that a skin would have to be exchanged though; this sorta thing would be an "at your own risk" deal. I'd do this with friends, but probably not with strangers.
you're the fol for believing him lol.
Imo, This really isn't a major issue. You joined a custom game and got duped. Neither of you lost or gained anything.
this makes me want to be able to wager skins
like not even 1 for 1
yo I'd wager like five skins for a single copy of one skin for example
