i have a fiat doblo 1.2 petrol struggling to fire but does not turn changed the fuel pump started 1st day changed then day 2 struggling to fire

Has the fuel shut off button popped up perhaps?

Usually at the kick plate to the right of the drivers (UK) side, there should be a hole just bigger than finger size.

You will feel a rubber covered button. Push it down till it clicks.

If not that, are you certain it is fuel related? Any stored fault codes?