Felix Alonzo construction

During the lockdown, I contracted Felix Alonzo for concrete flooring, roofing and extending one of my bedrooms. I did not bargain at all and agreed to pay the price he quoted. At first, he was very friendly and cooperative but once he bagged another contract elsewhere, he started dedicating his time on the other site and did not concentrate on my construction. When I asked him to finish my work, he became rude and started shouting and abusing, I was left with half of my work done. After I said that I will register a complaint with the county about this delay(3 months), he finished it quickly with a lot of defects and ugly construction. Even his workers complaint about his anger issues and bad man management. Please think twice before working with him, I repent contracting him and will not suggest any one to work with him.