My vacuum locks play up in the car.
Have to check that rear doors lock when I lock the drivers door and vice versa.
Today at gas station, tank lid is locked,,can't get it to open.
I did open and lock all doors and trunk and do it with both key and use the button on the door.
Can't get in, but still have gas enough to get to work tomorrow,,but after that?
Isn't there some kind of release in the trunk or somewhere else?

Yeah, there is a release in the trunk. Peel back the coverings on the pass side of the trunk, you'll see a big red knob.