Premanand Maharaj Ji
What should I do when someone deceives me after I dealt with them honestly?
Do not cheat, forgive the cheater
Do not cheat others or act with trickery, and offer that pure intention to Bhagwan. The one who deceives you bears his own karma, so forgive him.
The other person who deceives you, plays tricks on you, cheats you, will bear the fruit of his own karma.