Failure to take responsibility for poor workmanshi

In 2012 Hollard assigned a contractor, who is also the assessor (smell a rat?) to replace my kitchen that was damaged in a fire. My kitchen is very timy and took them four months to complete due to the unprofessional and poor workmanship they delivered. I have a book of e-mails whereby I have complained about the workanship, not to say the mans disgusting attitude whereby he resorted to swearing and being derogatory in my house. I pointed out to them the poor workmanship on numerous occassion, they sent out an independent assessor and I specifically pointed out this very unit which came crashing down and he accepted the work as ok. In the wee hours of Sunday morning this unit comes crashing down, damaging everything in its wake, including the contents. What does Hollard say......they are rejecting the claim....I am yet to know why....as communication is not one fo their strong suits...No Hollard you wont DO ME LIKE THAT AGAIN......