Still waiting on PIP appeal

Hi
I've been waiting 104 weeks since my PIP appeal was logged.
My wife has been calling them about it, and every time we get a different answer, but basically that we should hear about it soon.
Apparently it's taking so long because we sent them a voice recording of the pip assessment, because we feel that she lied about what was said in the assessment.

We asked if they have received my medical records from the doctors as I haven't received a copy of it, but once again received no answer, just that someone will look into it.
I sent a letter to them several times saying that my wife can speak to them on my behalf, but they always say that it's not in the system.

I am very nervous about this all and I feel it's taking way too long.
They have made mistakes within the last 104 weeks, like sending me personal info of other people and saying it was added to my file. (We contacted them and hopefully rectified it)

Is there anyone who we can get to help us with it, as my wife has anxiety too and finds it difficult to talk to people, or is it too late for that now?
Or just someone to help us with what to do next, as we feel that it's not moving forward.

They say that they are waiting on the recording being transcribed, though I don't know why that takes 2 years.

The tribunal service requested my medical records from the GP, which they said they were forwarding to them.

I have submitted evidence for the tribunal, and written letters saying why the assessment was wrong.

We were told in June or July that the case was with the judge and that we would hear by the end of the month, then we called again in the 2nd week of the next month and said we hadn't heard anything, and they said we were told wrong and they were waiting on the transcription of the disk.

It's just the stress of all the waiting and wondering, for 2 long years I have been feeling sick from worry.

It's an oral hearing that I asked for, but they said it could be a paper one because of covid.

I was never asked to transcribe the recording, just from the judge to send an extra copy of it to them.

As far as I'm aware the GP have sent my medical records in September 2019, it's just that we didn't receive a copy of it by mail, like I did for other evidence I sent.