给congressman写信

although i am still stuck with my own case, i have 2 cents sharing with you. you can find your local congrassman for help, it is worth try anyway. if you are in small region, maybe it will be helpful. if you are in major city, the immigration is very busy now with war and everything, even congressman won't get any attention from immigration.
you also should go down to your local immigration office where you had interview and ask them what happened, at least make sure they still have your file.
it is just my 2 cents. don't take it too serious.