Who damaged my room door?

Author's pov

When Amber's grandma couldn't open the door, she kept knocking.

“Why can't you open the door? You are the one who asked me to leave and now you are calling my name. Stop kidding me,” she said and stood at the door. When she didn't hear Amber's voice again. She hit the door heavily.

“Amber….” She screamed. Her heart immediately raced as she had no idea of what was happening to Amber. The door was so strong that she was too fragile to give it a heavy kick. It was at this moment she heard a knock on the front door. Her first inclination was maybe it was one of the women who took care of her.

“Joyce, please come inside. Amber has locked herself inside her room and she is not talking to me, and she has been calling for help!” She said quickly. The front door burst open and when she asked for a few seconds, Dave was rushing to her.

“What happened to Amber?” He quickly asked. Instead of talking, her grandma involuntarily reacted and pointed at her room door.

“Insid