i cant find a single samantha. f

Theres 4 buttons around the map, one on a candy cane by dead shot, one on the bridge on left (towards speed cola), one on the stables next to the mp5k, and on the door in the back of the ice rink. Then, head to spawn, and right outside the door, there will be a samantha doll. Interact with it, and then play hide and seek like on ZC nacht. She will play her song as she hides, making it easy to find her. Shoot like 3 or 4 of them and then head back to the original spot, interact, get a max ammo, play 115, and unlock the ending for 30k points

bruh what is it i have to do before i can buy the ending?