The reliable way to hire a tradesperson

Need someone to look at damaged walls in the lounge - lots of plaster has come away - we think from leaking gutters over the years that have now been fixed. Will want replastering but might need other work first, so wonder if a general builder would be a better starting point. Not sure which category to choose posting the job on here.

June 25 I had a new wooden door fitted together with new wooden surround . At the first sign of heavy rain the water came in just through two places, onto the wooden floor. Person who did the job wouldn't come back. Just need advice as to what might be the cause. I had my handyman to seal all around the frame, but water still comes in. When its light rain, there's no problem. Any advice will be appreciated. Geri

I have an 8 year old integrated w/machine, with the integrated door attached to it via hinges on the door. My problem is…the top hinge attached to the door has snapped 3 times this year and that’s after replacing the hinges. Any suggestions as can’t keep buying new hinges…TIA