We suspect someone who is corporate employer is illegally surveilling home computer and email Employee is being forced out of company by some unethical people who should we contact to investigate this matter?

It all depends on where you live. What country? State? Province?

What makes you suspect that they are "surveilling" your home computer?

We will be wasting our time if you don't answer the above questions - in great detail. Home computer using corporate software has no privacy, and if you are writing emails to people who might be forwarding them to snitches, you have no recourse. It's your own fault for trusting them.