Could do with some advice. I had a written quote (headed quotation not estimate) from a local firm to put in my central heating. The quote was for £4360. I agreed and they carried out the work satisfactorily, but I was then invoiced for £7271. I complained and pointed out that is was a quote not an estimate but they have only knocked about £200 off. This still seems outrageous. A lot of the extra was because the pipe system needed replacing and a new oil line put in but I was not informed that this would be extra. I told the manager he should have factored this sort of thing in. Where should I go from here please? Thank you.