Isuzu Trooper have factory defects?

Our company purchased two Isuzu Troopers on April and July 2003, respectively. By Early part of 2006, merely 2 years and several months from date of purchase, one one of the units went out of control or sustained a wild engine trouble. After thorough essment of the matter, it was found out that the major part of the repairs involved was the injector embly which Isuzu replaced for free.We filed a formal letter about the incident to Isuzu Phils. Whereby the extended their “sincerest apologies”, however, treating the incident as a remote inconvenience. In 2007, we brought the same unit back to Isuzu for reason of engine power shut down. Isuzu replaced the injector embly, again, for free, but this time including the Turbo Charger which was also busted and had to be replaced.The 2nd Isuzu Trooper that we bought has encountered almost the same problem on the same year. We Had to bring the 2nd unit to Isuzu Phils. Pls reply we are sure Isuzu Phils could not ignore us.