About the 'required' standards, most people are not able to meet them.
I honestly believe that my PIP objectives have been set so that I would fail. The real reason for all this that I've been too outspoken. I'm simply not the right cultural fit.
But you're right, it's not the right job for me.
So when was this incident that you was found guilty ? If you wish to continue this topic with drip feeding information it may take a long time to give you any practical advice to ease your panic.
Letter from Marstons..redacted would be a good start.