Back on my feet

Bought a Duster 1.5 DCI 4 x 4 and took it for the 15,000 km service. (No problem) and taking it for the 30,000 km service I was told my 1 year time limit has expired; never the less the Duster was serviced in Nelspruit for 30,000km service. Not long after that the instrument lights illuminated; electronic fault, preheating,ESP warning light, fume filter light and engine stop light. Took it back several times to cancel the lights and was then told a injector was faulty. It was replaced which I paid for and on plus minus 200kms the same problem occurred. After several unsuccessfull attemps for job cards get 2nd opinion. Vehicle not in use. Any help????