OCS Account flagged

I was asked to play toplane for OCS team legion. But apparently my manager said I wouldn't be able to play because my account was flagged. This is news to me, since ive never had any bans / warnings or anything. I even competed in OCS last year. Could someone from riot please shed a light or help me with this situation? and if my account is flagged how long would I have to wait till I can play competitive. Thank you
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