I recently did work for a friend (painted his motorcycle) in return he was suppose to put windows in my house. Well he kept blowing me off for two months so fiance's father, brother and i put them in due to winter month was arriving. I wrote him up a bill for the motorcycle 1680.00. He only wants to pay 750.00 supposedly the cost of installing the 10 windows. do i have a case to go after the full 1680.00?