To the best of my knowledge, I have never asked for reports for another player. There's no need to, as it only takes one report to flag the game for review.
As Nami and some of the others have suggested, your best bet will be submitting a ticket to player support. Punishments for toxicity are currently handled by the Instant Feedback System, which is a program, a bot basically. So, while it has the ability to learn what things the community considered unacceptable (things like "kill yourself"), it does not necessarily have the capability to judge context of whether someone is actually saying those things to someone else, or repeating what has been said in team chat in all-chat for purposes of asking for reports (unless it has learned that recently and I'm unaware of it). That is where Player Support can be of assistance. They are Riot employees, and can look into your case, and see the context of it.
But, just a friendly suggestion, it will probably help your case if you can take a few minutes to cool off before trying to contact them. Addressing them in anger, or being rude and affronted won't do you any favors. Being calm, and polite, and trying to explain the situation thoroughly, without the use of the word ridiculous, will help show that you are not in fact a toxic player. If you were permabanned for toxicity, even if it was something like this where you were quoting someone else and not being directly toxic to anyone, and then you show nothing but anger and irritation to Support, it will simply make it look like you are inclined to be toxic anyway. And please, please, whatever you do, don't threaten them. That definitely will NOT help you get your account back.