2000s European film about prostitute-turned-maid

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A high-end prostitute ends up in a violent party where she and all the prostitutes hired for the job are likely to be killed. She negotiates with one of the clients to become his girl. Later she falls in love with a construction worker and her owner finds out and has her lover buried alive in garbage. She stabs him in the neck and escapes to a different town and becomes a maid. She causes the main maid to become crippled and then takes her place. She gets close to the rich client's daughter
who is in kindergarten but gets bullied regularly. The parents don't do anything about it, so she ties up the little girl and pushes her down again and again until one day she releases the little girl who flails her free arms at her and finally learns to fight back.

Have to find the name of this movie. Help.