I can't believe s-Corp election deadline missed is even legal

Using a throwaway bc my boss knows my main. Looking for advice on a legal issue. Here's what happened.

S-Corp election deadline missed. I've been dealing with this for about 4 months now and the situation isn't improving.

I have already tried to resolve this directly but the other party is not cooperating.

What are my legal options here? Is it worth pursuing?

I've dealt with this before.

In my case, it took about 3-6 months to resolve. The key was having everything documented.