The law and order was and is designed in favor of thieves and exploiters and monarchs. If there happened a law and order exists for the citizens, you would apply for it, and get your mangoes back, and the perpetrator pays for his action. Better, if there is no law, you go and shoot the MTF, and he knows that he will be shot, even if he looked with a side eye to your mangoes, he would never dare to dream of them.
Therefore, you are not a victim of a mango thief, but a victim of the system designed by thieves. I hate mango thieves and the rest of them.
Take it easy, and cheers, it builds a character.