Visa and offer letter

Hello, my friend works at the clinic. Her employer (doctor of the clinic) sent her offer, and she signed it, but she never signed the agreement. The initial deal was that she gets a visa then license for beauty therapist.

The doctor was forcing her to do procedures without the license, on top sexually harassed her by touching and sending some texts over whatsapp. She wants to quit the job as she is under stress and not willing to work in that environment.

Now the doctor says she has to cover all costs for visa etc. Is there a way to avoid that? What are her rights and what she has to do? Pls advise.