I was away and got banned; -;

I wasn't on league much for a few months. But this summer when i came home and logged into my account I looked in my match history and saw a game that was played with yasuo.Im an all arounder main and i know i play yasuo too but the day it was played I wasn't on. When I logged in, it said i was "permanently banned." The reason why I didn't contact riot about this issue was because I contacted them in the past about changing my email or password i dont remember. And i had to answer questions like the first champ i bought and skin. Having this account for 2years i couldnt remember the best of my ability so i put annie. Riot messaged me and told me to fill out the following questions (the same one i answered to them.)So i thought to just not pay it no attention and just gave up since my password was a really long password. But i couldnt change my password because i forgot my email pass and yahoo couldnt recover due to my phone number associated with this account was no longer in use. Meaning, i had to contact yahoo through email and their email recovery were bots so i couldnt actually explain to them. (This was done before i got banned) I was wondering why i got banned like i said i couldn't check my email so i contacted riot and i got banned for account sharing i never had acc sharing. Plus i was banned permanently for using third party programs.I used mklol on my other account several months ago to try some of the new skins to see how it looks.And i checked the email and i got a warning i didnt know i couldn't use it so i unistalled it and sent an apology to riot. I find this unfair.