Recently Hacked - What do I do?

Losing a level 7x, let alone a Knight of Cygnus isn't a big deal. I know leechers who do that in one day...But still it was your char.

I would make a new safer account if I were you.

theres nothing like "safer".
even if your pass is 123456 hackers dont get that even that easily
you got hacked from keylogging for sure i guess...
best maple story sources that r safe r youtube strategywiki official site and forums.
dont enter suspicious links from forums..
and keep safety information from anyone... and change password once in a while