Help with door lock

Four of us

Active Member
Apr 27, 2011
386
133
43
Ipswich QLD
Just came back from a weekend away and went to unlock the front door and the key won't go into lock. The door is locked and normally when the door is locked the key barrel is in the vertical position. But my door lock is horizontal position. Does anyone know to unlock door or gain entry to van when the roof is down?