They do not care what you spent on the game prior to the ban. In fact they have no idea you are banned, because a computer decided it for them. It's cheaper that way. In fact, the system saves them so much money by doing all the work for them because they do not have to pay the personnel it would take to review the reports. All it takes is for you to type ANYTHING in chat ingame. And I do mean ANYTHING, you could type a "." or "hey". Get it? Then all anyone on either team has to do is click report. BAM, account is reported. Some players know this and spam report after every game. You have to be lucky and go through the act of God to prove it was a false report, so its too easy to false report. Besides, the odds of you making another account and spending money again are probably high, so they do not see much of a loss in profits from it. Riot has major issues with toxicity, so they adjusted the system to amp up the response to reports. They say its 0.06% of players are perma banned, but information can be misleading if it is not presented properly. Notice how they do not state 0.06% of active accounts? They probably don't do that because the percent would be much different. Let's not forget how many of those accounts are owned by the same individual.
I got banned for telling my team "I'm dead...", because the troll Sona on my team was telling everyone i was afk...The computer told me that this was unacceptable hatespeech blah blah toxic blah whatever they programmed it to say, blah. This was after the Sona kept putting me down and calling me names for 15 mins ofcourse. Guess what, that Sona still plays, they got chat banned because I got the notice, but I got permabanned. I had just recently got back from a 14 day ban, saying less toxic things than Tyler1 does on stream on a daily basis because of spam false reporting. I say less toxic things than the announcers shoutcasting and hosting the LCS ffs lol. I have said bad things before, like 3 years ago, but not in my recent games these past 2 years atleast. I have not demonstrated what I believe is hatespeech. I got multiple honors from my teammates, and I unlocked honor and rewards again. I thought it would be safe to speak again, but apparently they want you to never speak again no matter what it is.
If they do not unban my account, I have plans to bypass the time and amuse myself. I have recently picked up Overwatch and I am really enjoying it. Blizzard has a really good reputation, and I have had accounts with them since 2003, none of which are banned. I gladly give them my money and play their games :). You can play this game, you just can't type in it is all. Never type and you never get reported. There is nothing to report. You could feed into towers all day and your account would be safer than typing "hey".
I do not feel remorse for defending myself against an online troll who was going to spam report after the game anyway. I am not a racist, evil, hateful, mean person. No system in any game is going to make me think that I am. I am not out to get people or hurt people, and no false reporting is going to make me think that I do. I will always defend myself and have no problems admitting when I am wrong.
By the way, just did a game on 2nd account, at the end, one of my teammates told me I should die. Guess that's considered lovespeech LOL. They still play.