I got a verbal quote of €6,500 for a few new windows and replacement glass in three others as well as moving double doors. The job took a lot longer to complete then I expected with contractor back randomly. Eventually I rang recently to ask was job finished and he said it was, thought doors needed plastering but he said no. I checked bank details and paid the €6500, then he sends me invoice for €7650. I rang him and said we agreed €6500, he said that he doesn’t recall that and that he would be losing money….any advice appreciated