All they got was injured bodies who got beaten up by Anna in the dark. All they got was her echoing voice that scares the hell out of some people. In the end some were punished for being useless too until Gholaya was kidnapped too.
Initially Anna wanted to stay in the cell and have fun inside the cell until she heard Gholaya talking not just ill about her but about her husband. Particularly because Abhijeet didn't pick their another call, some of them even abused him. And all this made Anna's desire to play with them instead of inside, to outside.
While playing outside with little goons, Anna thought of ending it with their leader. She wanted to end things with someone who is at the fault, the most... Gholaya and Badal.
Anna wanted them to know the feeling of being torched by Abhijeet, but she also wanted them to know what fear is. People like Badal and Gholaya who always had a golden spoon in their mouth didn't know the meaning of struggling.