Phantom service - blatant dishonesty and cover ups

i find it necessary to bring to consumers' attention that Nissan Melrose are very quick to take a client's money for alleged work done, but have no intention of actually carrying out the work promised. My car was allegedly serviced, but a spotlight that was meant to have been fixed was not, the air-conditioner which they had 3 days on the first attempt, and a morning on the second, has been broken further, and they are unable to produce any evidence at all that any work was in fact carried out, no old parts are available, and no boxes for new parts are available. The dealership is being extremely uncooperative in finding a resolution. On speaking to Nissan head office, as pleasant as they are, they seem powerless to assist. I will be pursuing further avenues, including the relevant ombudsman, to have this rectified. My advice is to avoid the disappointment, and use a differently-owned service provider.