perma ban time frame?

Understanding I was toxic etc to get banned. Wondering if a time frame can reform a player from perm ban? In other games perma ban can be 18-24+ months. Wondering if this is the case for LOL

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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