Why am I served a Civil Action Hearing from the home owner after getting denied the Lien?

I'm a painting sub-contractor that was painting a new house for a building contractor. The contractor didn't pay a balance of $13,000 due. I used the steps Levelset defined to file for a lien on the property. After a hearing, the court sided for the property owner and the lien was terminated. Now I get a Civil Action Hearing Notice...$12,000.00 The homeowners complaint is "Defendant engaged in the wrongful use of civil proceedings in violation of 42 P. C.S.A. section 8351 by pursuing a Mechanic's Lien Claim against them in a grossly negligent manner and/or without probable cause."