Scenario You are in a post apocalyptic world,The technology

Scenario: You are in a post apocalyptic world,The technology ranges from Energy weapons to swords. You and a friend who is a mutant are travelers looking to make money and get higher up in this world. You are given a quest. A person’s brother has been kidnapped and is being held hostage, in exchange for the debt the person owes. You are tasked to ‘deal’ with this situation. The kidnapper, has  a gang of thieves on the outskirts of the town. What is the best way to deal with this situation?