Dial The Operator

Dylan and Tommie have been best friends for over a decade. But when they both get placed into a new world where they have to face all of their worst fears, their friendship slowly begins to crumble.
Then there are the Revenents. Ghosts which appear for only one purpose. Killing both Dylan, and Tommie.
With every fear they have to face, they're transported to another planet in the same dimension. And on every planet, there's a button. If one of them finds and pushes the button, the Revenents disappear forever.
There's also a phone. An old, creepy phone which can only call one person. The Operator. But if they call him, everything ends. One of them will be transported back to Earth, and the other dies.
How will they escape?