Help me o LoL community

Im currently being messaged by some guy who was in one of my games (we lost) and he is telling me to die of cancer and other awful things, how do i get this to riot so something can be done? Any help would be nice :)

Edit: I can't log into the support site because my e-mail is not verified and i have lost the details to that e-mail address. So here is the conversation for you guys to judge

Please remember that Riot employees will never ask for your password when assisting you. 19/01/2016 [4:36PM] InnoVationS0088: ????? [4:36PM] (Flamer): i can tell urgot is really OP our support did more dmg then you soooo good soooo pro i hope you die of cancer really soon [4:36PM] InnoVationS0088: do you know how hhorrid that is? i play league for fun [4:36PM] (Flamer): i dont care your a retarded piece of **** [4:36PM] InnoVationS0088: you should too xD [4:36PM] (Flamer): and i hope you die really ******* soon the sooner the better [4:37PM] InnoVationS0088: aye that one you do realise i will be repoerting you to riot? [4:38PM] (Flamer): do you realise i dont give 2 shits? every single game i play i get idiots like you that are passive agressive all ******* game ruining my experience in the game i dont give 2 shits anymore about this game every single time there is 1 retard like you that fucks everything up get me banned i dont give 2 fucks [4:38PM] InnoVationS0088: why dont you just quit then? if you can have fun why play? [4:39PM] (Flamer): cause i enjoy ranked were people like you are bronze 5 while im plat [4:39PM] InnoVationS0088: but that was normals .. [4:39PM] (Flamer): so i dont get retards like you no but i need level 30 for ranked now dont i you dumb **** [4:39PM] InnoVationS0088: so how do you know about ranked? how can you be plat at lvl 25? [4:40PM] (Flamer): you are dumber then i thought omg maybe more then 1 account? [4:40PM] InnoVationS0088: why not stick to 1? [4:40PM] (Flamer): cause i felt like making a new one like how stupid are you to ask abvious ****? [4:40PM] InnoVationS0088: more like you got banned... [4:41PM] (Flamer): nope i didnt [4:41PM] InnoVationS0088: seems you're a little bit toxic [4:41PM] (Flamer): i had a **** day yea quit smoking 2 days ago no im not the happiest i've ever been atm deal the **** with it [4:43PM] InnoVationS0088: you're the toxic one not me maybe take a deep breath get some fresh air [4:43PM] (Flamer): no but you are the reason im toxic atm cause you pissed me off [4:44PM] InnoVationS0088: there is no reason to be toxic over a game especially bringing cancer into it [4:44PM] (Flamer): well if you want to win and you get an urgot mid feeding then blame me i get toxic so stop talking and go uninstall you'll never be good [4:46PM] InnoVationS0088: and you're plat? but this is the mentalilty you have? hmmm [4:47PM] (Flamer): you know whats funny tho? i got the green ribon on my main but hey you probably dont even knows what that stands for [4:48PM] InnoVationS0088: it's for friebdly, and i still don't beleive you what's your main account name? [4:49PM] (Flamer): arcanelyrricist [4:49PM] InnoVationS0088: summoner not found that account does not exist [4:51PM] (Flamer): my bad arcanelyricist [4:53PM] InnoVationS0088: ok [4:54PM] (Flamer): have a good day [4:55PM] InnoVationS0088: I'm just letting you know this is still going to riot [4:55PM] (Flamer): just letting you know i still dont give 2 shits its was sarcasme i still hope you get hit by a bus will take good 30 minutes before i might stop hoping that

So there we go, i replaced his name with "(Flamer)" becasue im not very creative but still didnt want to just spread his name on here