i hired a contractor to do a deck and railing job he walked off the job and now is expecting pay. he was very nasty when i told him i had problems with his quility of work and that he ruined my materials. he said he had a hard time and i asked him why he did not come to me in stead of continuing and ruining my materials. he was yelling at me,scared my daughter and said he quit. Do i have to pay him?