This game is very important to me

I really enjoy this game but barely play by myself (unless its ranked). I was looking at my old banned profile recently and thought it was kinda weird and a little unfair that I got banned after 1 game. I've played thousands of hours and hours on this game and most of them on Dec1236 which got banned about a year or two ago. I played countless hours, and at the time and developed really bad relations with other people. I started to kinda vent my problems out on other players and met this one guy in solo queue I added him and played with him for about half a year. I was comfortable and sometimes traded profiles with him cause I wanted to try Yasuo when he came out and he liked to play Oriana. He wasn't on as much and when I would play games with him he would start to rage about how bad our team was. That's how I got it suspended in the first place. What led up to me getting permabanned was I played one game with a person I had played with before and I kinda fed. He targeted me the entire game (stealing cs and levels from me) and got me really toxic I told him countless times to kys and I realize how bad that is now but at the moment I thought he was my mortal enemy. I thought I was kinda safe saying these things as I haven't gotten chat restricted or suspended in over half a year. I can't believe I got permabanned for one game out of the countless thousands of games I've played. I have changed a lot and have honor lvl 4 on more than one account. I kinda want my old account back though because I've spent $200+ dollars on it and I really want the nostalgic feeling of my old account and I most importantly want to see how many of the friends that I used to have on that account are still playing. I really miss some of the old people I used to play with and I think that I have reformed and matured greatly in the past 2 years. Sincerely someone who has been addicted to your game since the end of season 2.