@bagder sounds like maybe a bad fuel pump, and also a broken fuel gauge. Curious if they bottomed out the vehicle at some point and caused damage to the fuel system.
@brektyme @bagder I would suggest consulting the manual to see how to reset the fuel shut off safety switch. Sometimes a physical thing hidden round the centre console. Failing that, have the vehicle recovered to N. Grayson Auto Electrical, Ulverston Road, Sheffield. Chaotic, not cheap but cars they mend stay mended.