I had a problem with my cistern, which was not re-filling. Not only did the engineer they sent fail to fix the problem, he told me that it could not be fixed without further extensive (and expensive) work, for which he would need to bring somebody else from his company to give me quote. In addition, he turned my water off completely meaning that a little later I had no water at all (not in bath, sink or toilet). I got in another engineer who fixed the whole thing in 15 minutes - turned the water back on and fixed the problem in the cistern. As might be imagined, I was not pleased to be asked to pay for the privilege of having no successful repair carried out and my water turned off. There was yet more fun in the invoice they sent me which included work (on a roof!) which was absolutely nothing to do with me. The worst service I have ever received.