Two engines in 6 days

Bought a new JMC carrying 2.8 tdi 1.6 ton off the shop floor. Big end bearings went at 2000km after the first week. After a fight where i brought in Wesbank to assist they agreed to replace the motor and not repair it. New motor installed after 3 weeks of arguments. New motor went on the first day 2ooKM's. JMC H/O blamed my driver for over reving the engine. I refused to accept this and insisted i was present when opening the motor. On opening the motor I (not the mechanic) found a bolt on top of one of the pistons. (obviously happened during factory assembly as it is impossible for the bolt to travel through the turbo). JMC H/O blames dealership, who are trying to get them to install a new engine. It is 45 days since i bought this truck i have only had possession for a total of 6 days. No apology from the holding company, no contact, DO NOT BUY THIS **** its not worth the problems you will have.