FYI - I had my interview scheduled 2 weeks ago after filing an inquiry online and also working with my senators and congressperson to send an inquiry as well. On the USCIS API, the dates immediately began to change.
After the last Senator sent an email to me about making an inquiry, in 10 minutes I got an interview scheduled email. I think doing this really helps. Please provide as much details as possible, because their office is massively swamped. Had one person communicate via email at 1:30 am Eastern time.
Will let you know if I have more issues.