I contacted the Ombudsman in September and received a letter from him on October that he has send a formal inquiry, bla bla. I emailed him yesterday and told him I have not received the result of the inquiry yet and that I am considering filing for for a Writ of Mandamus to compel USCIS... His office replied my email right away that they searched their system and USCIS is activly working on the inquiry and thanked me for my patience... I am not sure if I should proceed with the Writ or I should wait.