Maria is the helper

An exploration of the Maria is the helper theory.

Explanation
The helper is the entity on the other end of the phone call by Maia, after she escapes from the men in suits at the cabin. It is often assumed that she is calling the wise man because the large man comes and brings her to a room with the wise man.

In this theory, Maia is actually calling Maria. The large man is able to capture Maia and bring her to the wise man. After the large man carries away Maia's body, Maia eventually does end up outisde of the psychiatric hospital with Maria. Then Maria brings Maia to her place for safety.

Questions
 * How did Maia end up outside of the psychiatric hospital?
 * Why did Maia call Maria?
 * Who did Maria send to get Maia?
 * How did Maria help Maia?
 * How does Maia know Maria?
 * Did Maia know who she was calling?