I provided client with a bid/scope of work and he agreed to all work. Work was performed completely. We addressed some concerned he had and mentioned he could contact us if he had any other concerns. He had no additional concerns. We sent bill and he refuses to pay saying he isn’t happy with work. We have offered on several occasions to come out and address concerns. He states he doesn’t want this and will not be paying full price. We failed to get a signed copy back of the bid/scope of work. However we have several texts from him demonstrating our agreement and work order changes ,etc. as well as texts demonstrating our desire to address his concerns. Can we file a mechanics lien? He has paid absolutely nothing towards the invoiced work.