L2 visa appointment not available

I am working in the US on my L1 visa and my spouse has applied for L2 visa in March, 2018. It’s been 4 months and I am unable to book an appointment for her on any date at any location. Is there anyone facing the same problem? Can someone suggest how to fix this?

I had done this in the past , hope you are worked in the IT write a script to check the website ever 2 hours and update you when a slot becomes available.