And if you missed the court date, just try and call them, say, before 11:00 am on Monday. Try to have someone on your side in the room with you when you make the call. That way, you don't carry the burden alone. If not, maybe write a little before, during, and after the call. Sometimes like zen or art, less is more, but a little bit of writing can help.
I'm intrigued with the above person who's saying, tell the court you've been diagnosed with autism spectrum and ask them to appoint someone to assist you in dealing with the court.
And with the IRS, and I've worked for H&R Block, I've read that it's better not to agree to an overly ambitious payment play which you end up not meeting. Better not to agree to any plan and simply make payments when you can. I do not know if this applies to the UK.