can rito re-active a permabanned account?

Can they? Sure. Do they? Hardly ever. The only exception here is accounts that were banned for a chargeback. Typically, once the chargeback is resolved, your account ban will be lifted.

per·ma·nent /ˈpərmənənt/ adjective 1. lasting or intended to last or remain unchanged indefinitely.

They hardly ever do this unless it was an inaccurate ban.

Unless the ban was given in error, Riot does not reverse permanent bans.

They can but there to lazy to even listen to reason