Can you give me some spiritual guidance, please?

Being spiritual is not equal to being a doormat. You deserve restitution. You're going to have to be willing to be a source of conflict or suck it up and accept the loss. If it is cost effective, pursue legal action to get what you're entitled to. Tyrants, liars, and thieves must be handled for what they are. To allow them to bully, lie, and steal only teaches them to repeat their actions since they think those they've duped are too stupid to stop them.