Just wait until you get unbanned? It shouldn't be permanent if it's your 1st time. You can also write a ticket asking why were you banned and also to ask about the duration of your ban . You could also try to send a ticket to Deca straight up saying you were using the hacked client because your PC doesn't have a good gpu and can't handle Exalt (Worth noting, writing a ticket with pure QQ and statements like "I wasn't using a hacked client I Promise" does not work at all in this case.)