There's a number of possibilities. Assuming it's compatible with my 2009 Spaniard (VIN starts with VSK):
1) The fuse is blown. Open the glove box. There's a small panel in the left side, put your finger in the opening and pull towards the rear of the car. On the left side (should be, in Australia) is a column of fuses that go top to bottom with no gaps except two at the bottom. The 6th fuse from the top is "DOOR LOCK". Check it.
2) The keyfob signal isn't being recognised by the car. That's normally a security device so that someone else's fob won't open your car. If the key operation doesn't cause the hazard lights to flash, this may well be the cause. If the hazard lights flash, move to 4.
3) Door switch indicating open. It should show a red light that looks like an open car door in your dash. If this is the case, work out which door. We had a car that I replaced the switch in and it didn't work, because the door itself must have moved slightly and the switch was just short enough to prevent the door from closing the switch. Check these. I added a small self-adhesive rubber pad to the door frame to fix mine.
4) Door lock(s) not moving the cables. It's happened, some of the connector is made of plastic. If you can hear the solenoid in the door trying to do it but not making any progress, this may be it. You may need to remove the door inner and check the clamps and connectors on the door wires.
5) Door lock solenoids not working. Check the output of the BCM on terminals 2, 19, 23, 114 and 116 compared to ground. If there's power here, maybe the earth to the doors (start with driver door) isn't adequate.
6) If there's no response, no flashing, no sound from the doors and the door open light in the dash is doing the expected thing with door opening, The keyfob ID code might not be accepted by the car. It's usually the dealer that has to use a Consult device to register a keyfob. I don't know of any way of doing it by pressing buttons or anything inside the car.