Not possible. Customer service can't ban your account though, but calling them would be pointless anyway. There's a page on Playstation's website that talks about bans. Iirc, there are no appeals, no reversals. They make absolutely sure about you or the system before banning. I think flagging is done automatically, but those systems that are flagged are likely reviewed by a person. There was supposed to be a class action lawsuit about this sort of practice, for all console manufacturers, because it severely cripples the used market, especially when a person isn't told the system is banned.