I was targeted after being verbally harassed by a supervisor and then terminated one week prior to a scheduled vacation

I do not see a specific question so I will give a general answer.  Harassment is unlawful only if it is directed to you due to a protected class such as race, sex, national origin etc.  Retaliation for a complaint of harassment is unlawful only if your complaint is a "protected activity."  It will be a protected activity only if you are complaining about unlawful harassment (see previous).  North Carolina is an employment-at-will state where an employee can be fired "without cause."  Vacation that is accrued but unused does not to have to be paid out when a termination occurs if the employer has a written policy that covers such a situation.  Hope this information helps.