Hi, I am not able to type Chinese now, but I really want to encourage you.
My friends had the same issue as you. She has paper fax with the landlord where the land lord agree to rent the apt by herself. The landlord rented the apt 4 months later and wanted to ask my friend to pay her the 4 months rent. My friend went to court and won the case with the paper fax.
If you have any avidence that the land lorder had agreed to let you go and rent the apt. by him/herself, you don't need to worry anything