Sorry if this is long I didn't want to drip feed.
I have recently had a new kitchen fitted. The work included removal of old kitchen, fitting of new (including electrical work), plastering, tiling and decorating of both the kitchen and front room. The kitchen fitter quoted a price, but only verbally. On chasing I received a text which said "based on 8 hours per day, the price is £1700". I have always been clear I wanted a fixed price, and there has been no conversation regarding either hourly or daily rates.
We agreed to go ahead, and agreed a 2 week period. Just before the work started it was clear he wasn't a qualified electrician, which I was not happy with, and it was agreed I would bring in an electrician and they would work together. Dates/times were agreed. No price change discussed. There was also a change to the plan, but it was agreed it could be done within the price. The only price change we agreed was for overtime working one weekend, however despite several requests he did not provide details of the additional cost. This was agreed for 1 weekend only.
It turned into a nightmare - 10 weeks later and the work is half complete. I have received a bill for £2500 - the kitchen is fitted (but plinths not installed), plastering done but no tiling or decorating. He also left my house in a terrible mess with debris everywhere. He wants a further £800 to finish the work. The work completed is good, no complaints. But I do know he spent a full 2 days putting knobs on and shelves in -- there are 5 cupboards and 4 built in appliances! Its only small.
My question is am I legally entitled to rely on the text re fixed price and not pay the invoice? For a number of reasons I do not want him to complete the work - I am prepared to pay the £1700 to bring this to a close, but I need to know if this is a reasonable course of action. I want to be fair.
My other question is surely is it was a day rate estimate this would be written down and surely an almost 100% increase with no discussion prior to the invoice is unreasonable?
For completeness, I have used him for other jobs, only 1-2 days and that was on an agreed hourly rate. However, there were no conversations regarding hourly rates.
Advice greatly received as for other reasons, this is likely to have a big impact on my personal life and I want to make sure I'm on solid ground with this.