UNHAPPY WITH FORD

We bought a ford ranger 3 months ago... after 3000km the injectors packed up, it was replaced and 3 week after it was replaced we having the same issue. Injectors packed up again. How can injectors pack up twice in less than 2 months, on a brand new car???? Our dealership promised to replace the car the first time then once we got our car back after it was repaired, the dealership went back on their word and said she never offered to replace the car...(I have emails and proof where she did promise to replace the car) VERY DISSAPOINTED WITH FORD RANGER AND ALSO WITH FORD