Have a false mechanics lien filed against property. What to do

[Jessica Hughes]

So I have a 4plex in Tulsa county. 

I'm under contract with a buyer right now.

had a contractor spruce up 2 of the units. 

things went south with this "investment contractor". Long story but I found her guys to be very incompetent, slow, and lacking in basic carpentry knowledge. Let them finish the jobs though because they were small and I am under a construction loan I wanted to hurry up and get out of. 

For both units I have the estimate, invoice, and signed lien waivers.  

Two days after the property was put on market, a lien was placed for $2370. Found out about it today after title work came back. 

No responses when I text her. Talked to my property manager (who originally recommended this idiot) and he said it might be over a door i told him she needed to have fixed because it broke off the hinges a month after install and maybe theyre mad about it. It's just a theory

Im calling the county tomorrow to see what exactly the lien says, but yeah... how the hell do I handle this? 

If I pay it off just to close with the buyer will that limit any retaliation I have? If they choose to close I don't want to eat 60k to fight over 2500 bucks, but it does really stick in my craw and I would like to file charges for a false lien at least 

The fact it was filed 2 days after list seems retaliatory and vindictive. This psycho chick is a realtor with a renovation company, and apparently wants to commit a felony to get back at me for calling her stupid? 

Please advise