Been building a house, utter nightmare. Got a contractor to do the septic tank and groundworks. We gave him a list of the work we wanted done and asked for quote. He could never say definitively what the costs would be despite our constant asking. He would ask for round sums and was paid. At end June he asked for a further 6k then when we met he asked for 9k saying it was payment in full. We paid and then discovered a lot of issues, things undone and unsafe. Spent 2 months calling him and being given excuses or not answered.He came back for about a half day to fix some of his poor work. He waited 6 weeks and then contacted us for 6k more. He's looking to charge for about 70 hours of digging time and lots of stone. He simply didn't do that time nor was the stone supplied but we have no proof. He's sent us a solicitors letter demanding money. We've been through hell with trademen. We really don't need this but can't pay for what we didn't get and worse for things done wrong. Any wisdom to offer ??? Anyone please ....