Waiting for citizenship for my wife for over 2 and half years

[shbandar]

Hi all, 

As you all might know in texas the processing times are very long nowa days, I have filed for citizenship for me and my wife in feb of 2017 (my GC is based on employment), in July of 2018 We both got interview on the same day with different officers, my case was approved, and i became a citizen in 3 days after that, however for my wife, the office said, she was waiting for some additional file to be retrieved from storage and once the file is with her she will make a decision. 

its now May of 2019 almost 10 months out and closer to two and half years since we applied for citizenship, and i am not sure what are my next steps. 

I tried multiple online references and no response yet. 

I have tried to get an info pass, they are never available in texas.

I was told I could use writ of mandamus an its a very expensive process. is that my only option ?

Please help