Can someone help me please?

Hey there. I know the Internet, and I know ppl who sometimes have a bad behavior. I am one of those peaple... Well, I was one of this people. But there is something I never would do. To threat someone in a game. Today I had a game. It started with a simple sentence from myself. I was support, and I wrote:" Oh, not again a jhin..." And the Jhin started to flame about my family. First it was funny, and I took it as a bad joke. But the jhin didnt stop. I know, I could have mute him, but I didnt... Dont ask me why. So to continued flaming me, til I wasnt reading the chat anymore. Later, I just realized that also the enemy team was flaming me. I mean it was hard, but the game was over anyway, and it really started after the game. The enemy ryze was threaten me... Sent an IP adress and told me he was going to kill me in reallife. Also the Jhin did. I am really scared now. How can I get my IP adress? And why are they telling me to kill me? If there is a Support, please look at the chat logs