Blatant disregard

I chose Dave Miller to install a toilet unit and the entire installation is incorrect (according to the unit manufacturer). The manufacturer spoke to Dave Miller receptionist (not sure of title), to explain the situation but the person at the plumbers initially refused to believe that a toilet could be installed incorrectly. None-the-less, I called after a week or so for them to correct the problem but they replaced a part without acknowledging the main installation issue (unit installed on cement instead of on tiles and it leaks continuously). Someone was in the area and they called me to check the problem. I am home 24/7 and it is polite to make an appointment. Altogether; it has been months and without using this particular toilet. Now I shall start using it and I beckon for Dave Miller Plumbers to treat this case as urgent or serious.