How do i get my things back?

my bestest friend just stole my DS games and i tried calling her but she wont pick up.she stole them on the last day of school so she could have them for the whole summer im so mad at her but i feel sad for her because she lives in a trailerhouse her clothes are holy and her hair is messed up all the time and she barely gets any thing special but she couldve asked to borrow them and i wouldve said yes but noooooo she gos along and takes the worse way what should i do to get our friend ship back on track?