Did you have a quote in writing from him suzie? I have learned my lession with tradesman, always get written quotes you can hold them to, with details of how the work will be carried out. I have Victorian railings outside my house and a guy but both sets back at different times, I pointed out they were wonky and they just carried on. I called the boss out when he had the cheek to send me a bill and told him that if he pursued it I would tell all my neighbours who did the work. They still look like a bunch of pea sticks but I never paid him. If i were you I would get him round on Monday, give him a written list of what is wrong (and keep a copy), and tell him that you don't want to him to start any of the rest of the work until they rectify what's gone wrong so far. Ring him up, get him round, don't let him touch any more work until you've laid it on the line with him. You're the customer.