Terrible Service - never available on the phone

Would like to complain about this gentleman, he comes, you tell him what you want done, he gives you a price, with me it was verbally, the payment he wants straight away and than the job gets poorly done or takes his time and when you complain, he tells you it was not in the price but you told him what you wanted and he quoted you, eventually I got someone else to finish my job for me, which I had to pay extra, never will ask this company to do any building or extensions in my house.