Dmax locking problem

[Kentishfarmer]

All the locks except the drivers door on my 2013 IZUZU Dmax have stopped working. When you press unlock on either the key or the interior button you can hear something going on like a half unlock but it never fully unlocks. Manually opening the mechanism below the handle won't work either. The drivers door stopped working at the same time but putting the key in the lock and turning seems to have fixed it and it now works on the button, but the rest don't.
The fuses seem to be intact, does anyone have any ideas on how to fix the problem?