san francisco assessor wrongfully assest my property

I am seeking a freelancer to work on a project in San Francisco. I have a 3-unit apartment building that has been wrongfully assessed by the assessor. I have official documents to prove it. I am looking for assistance in negotiating with the assessor - not legal advice or help in filing an appeal. This task requires someone with experience in tax assessment negotiations and related case law. If you feel you are a qualified candidate for this project, please contact me to discuss further. Thank you.