I have agreed to help HR with their investigation (this is not a place where I work). They are sending me emails with a rude 'you will do what we say and comply with our processes because we are higher than you' tone. They have completely missed the point that I am not one of their employees and am doing them a favour. I owe them nothing.
I am in communication with someone else from the company. I want to say something along the lines of.
I am happy to help HR. I am not happy for HR to bully me.
Bully is too strong. I just want them to wind their neck in!
Please help. (I am rubbish at writing corporate emails)