Peugeot Partner car won't start

I was driving back home, stopped at the mall to get get cash, when I was now going back home started the car and put it into reverse and a woosh sound came from the engine and that's was it I crank it continuelous and it does not go on, no one can seem to find the problem it's a 2012 diesel it was running smoothly now it won't run I'm really stressed out, we checked the timing, fuel line and electronics they are all fine, it cranks with power but it just won't start, please help