I am a general contractor, I hired a stucco guy that had a crew. I paid him after every phase and he paid his guys. Now one of his helpers is demanding me pay him directly and now. My dealings were not with him, they are with the stucco guy that I hired (verbal contract). His helper is now threatening to do something to my house damage wise and/or place a lien. Will I be obligated to pay him in court if my dealings were not with him?