my friend got perma banned at lvl 11. why? he is never toxic and was given no warnings at all.

Not sure if this has happened to others or not. My friend "Rivashar" was perma banned without warning and without being toxic ever. its been difficult for him to get in touch with riot so hopefully a rioter will notice this and give me some advice. he cant log in. he cant seem to submit a ticket. i just want to know why this is happening to him out of nowhere. please lift the ban or give some actual reason to stopping a loyal costumer from being able to play.
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