i got all the keller family tapes 1 to 5 but it still doesnt open the bunker what do i do

The bunker or the armory?

You need to access the armory first through the door in the National Guard Depot, then you find a computer console in the armory that accesses the bunker behind the armory.

But i cant find the armoury i searched all over the place.

Armoury is underneath the depot, through a door with a light and siren that start flashing/whooping when you open the door, then down through a door in the floor (switch on the wall type).

You need to access the uppermost area of the Depot, above the cafeteria section to open the door that leads to the armoury....which is marked Utility, I think.

To get to that upper floor, you need to go through the Training Wing and Offices which is acessed through a door on the far side of the cafeteria.

just go on youtube and find a tutorial