Is it considered an injustice not to give a young man what was agreed upon to a girl who exposes her body for money, and what should he do if he cannot reach her?

What some girls do by displaying their bodies to young men is a reprehensible and impermissible act. It is also not permissible for them to take compensation for this, and if they do, it is an ill-gotten gain, akin to the harlot's wage, due to the Prophet, peace and blessings be upon him, saying: "The worst of earnings are the harlot's wage, the price of a dog, and the earnings of a cupper." And whoever benefits from an unlawful service in exchange for compensation must spend this compensation on the welfare of the Muslims.