Usually the notice gives you how long you're suspended for.
If it didn't show a time limitation, you may have been banned. But, that's the worst case scenario.
You could send in a ticket, but notice that it may take quite a while for the Nexon staff to get back to you, currently my ticket has been in the "open" position for eight full days now.
Also try checking your player profile on the Combat Arms site, usually there will be a text that lays on top of the player's picture that says whether you were discharged, suspended, but if there's nothing, then you're fine.
If you're completely worried, send in a ticket, it wouldn't hurt, unless you're impatient like myself.