Hi We had a new central heating system, hot water cylinder and radiators fitted. Total cost was £14.5k We paid £2k before installation and £10k via a government loan, and have been paying the rest in instalments. Theres around £1k left. Part of the package was a check up inspection after installation. We had issues quickly. The heating worked fine and it gives hot water, but intermittently the hot water stops. We often cant run a bath. After about 2inches of water in the bath the water just stops, won't then come out of any of the taps in the house for 30 to 60 minutes. They didn't come to do the post installation check as promised and I emailed repeatedly about coming out. They didnt until 11 months after installation. They ran the bath and this time it filled, they said its probably a washer, and have refused to come back. I have chased them over and over to sort it out but they wont come out. They have chased me aggressively and threateningly for full payment. They now say how can I expect them to service it until I pay in full, and that by missing last payment I have broken my promise to pay. I'm not confident I'll ever see them again if I pay, and we'll be left never being able to run a bath. It's been a problem from the start and I have all my emails complaining to them. I have photos and videos of the tap stopping. It's a sort of stalemate and I'm not sure what to do next. I'd be grateful for any advice. Thx