Got permanently suspended for intentional feeding?

Okay so i just got suspended for intentionally feeding, it might be a permanent suspension. The reason is intentionally feeding. Things happen in that game is, i played amumu jg as i usually do, then after some minutes my teammates start crying that i am useless (well kinda of, i am not at same level with them). So at a moment i decide to do something: i found an enemy champion with half health, then i charged him, but my health drain a lot faster, i finally discovered that i am way behind him in the sense of sustainbility, so i retreat but obviously, its impossible. I only did that once in this entire game, and it looks like its intentioned, but nope, i am just trying to prove to my teammates that i am a thing. after that charge i admitted i am actually useless and suddenly stopped. I was suspended for 14 days the same reason already for hyper aggresive playstyle, so i played extremely passive, i dont think theres any chance for the system to catch up my minor mistakes and decide that i should be exempted from the game, because of bad skills and even slower reaction, and even grindy behavior. I ask for a manual review of my gameplay and find out whats actually happening, i learned from my last intentional feeding suspension, and i have confident i never did similar things again, i controled my temper, try to be calm all the time even my teammates cry, i put all that much effort and time investments, the reward isnt tasteful to be honest. You are discouraging people from improving

Addition: The last time i got suspended i dont even know what the term intentional feeding is, until riot support told me that it means fighting under enemy tower; play hyper aggresive; and run into a lot of enemies (lets say, see a couple bar of red, then u should stop from keep walking). According to these information and instructions, I didnt do any of the things said even slightly, because of the previous punishments, i tried to avoid all the said behaviors very carefully. Well sometimes i run into enemy due to more than 7000 ms laggs, i think that is not the reason i got suspended. I am still confused how to define intentional feeding, it seems doing anything can be considered intentional feeding, the word's definition need to be further cleared or my suspension is unjust.