If my employer sent an employee to spy on me while i was in the bathroom stall multiple times is there anything i can do leagally if i hve proof ofit?

There is no right of privacy in a non-governmental workplace and this is not a matter covered by employment law in North Carolina.  There could possibly be some tort claim such as intentional infliction of emotional distress, but that claim and the other torts that might apply are very tricky in these situations.