after standing for a few months car won't start.Tried jump start and bump start on 2008 Dodge Caliber

car has been towed into a recovery centre where mechanics have had it for 2weeks and think it is the ECU I think the car should not have been jump started and certainly not bump started, incidently neither has worked and I am afraid of damage to the car. It is not with a qualified Dodge repair centre which also bothers me as it seems they are unable to solve the problem and so are trying everything which could do further damage.

3 answers
Try cam sensor back right side if you vae a 1.8 l not so much the sensor but the wiring in the harness
you might have a mouse that chewed on some wires
Can the engine be turned manually (wrench on crank bolt) ???