How can i report someone?

Like I wanna a send a mail. Im really mad, its not just that ive lost an easy game. It's that in the last 7 or 8 months I reported a shitload of players who were toxic, offensive, you name it and I think only 2 times I've got a message back from Riot saying they got banned. The other times? lol, nada. So I just wanna send a mail with the players name to a Riot employee, i tried at the support category but none of the categories fit so should i just send a normal email?
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