IMO it sounds like you've seen her more than once.Just don't believe a girl you've seen only once would text you like that.Her texting you doesn't surprise me,as i've had that happen a number of times,but only with girls i've seen a few times.TBH I have no idea whats gone on here.But i suspect theres more to this story than you're letting on.Just find it hard to believe that you'd go to all this trouble for a girl thats just pissed you off a bit.As i said most normal guys would just walk away and onto plan B.If the story you've written is true you've totally over reacted.She never stole from you or abused you,just wasted your time and possibly hurt your feelings .I suspect you liked her and feel rejected in some way and are just trying to get some form of revenge.But fuck knows.
And just to say if someone told me they were gonna ruin my livelyhood for no good reason. I'd hunt them down myself and ruin them(not just carrer wise if you get my meaning)
Also i'd just add,threatening working girlsis a very bad idea.I did much the same myself a number of years ago.Which led to a horrendous situation.If you find yourself in this situation again,it's best to just walk away and not make any threats.If you have someones phone number it's really not that difficult to find out who they are.