I talked to my maid, she said she file the case to consulate and an association helping labours, she said she called the association, and said the letter is just to scare the employer. She just ask me to give her a copy of the letter and she will pass to the association.
I'm also thinking not to renew with her if the case can't be settled, but there's still several months before contract finish. Afraid something will happen before her contract finish.
She show me the complaint form file to the association, and she said the same filed to consulate. I have give her a copy of the letter, and she will file to the association also. Anyway, i asked her to settle the problem asap.