THIRD, check if you've been hacked in the first place. HIBP (HaveIBeenPwned) by @troyhunt is the best place to check this. haveibeenpwned.com. you've definitely heard of it. if not, how?
keep in mind, this is public information! and you probably don't want everyone to know your account is in a data breach, so let's fix that.
SIXTH, clean your account. download your wattpad information. visit wattpad.com/settings/your-… on your computer or some sort of html viewer, and take a look at what it has on you.
then, get rid of as much info as you can. blank gender, fake birthday, whatever-- anything you can control info wise, PLEASE change it.
SEVENTH, secure. if you havent already, change your password dummy!!