Children's Aid and Abuse of "Power"

A child protection worker (CPW) called me a couple of weeks ago. Her name is Kelly Middaugh and she was very nonchalant when she said, "I bet you aren't surprised to hear from me, are you?" She sounded as though she thought it was funny. She had seen my son that afternoon and had to see me. Great. More BS. So we set up an appointment for Friday (it was Wednesday), which was cancelled by her on Friday morning.
Last Friday, she showed up. I was told a few disturbing things before she did show. My son came to me and said, "She is a different worker person Mom!" I asked, "Oh you mean different from Leslie (Coombs) that your dad and Susan made the allegations against me to in August?" My son said, "Oh yeah but also a different worker than the one I saw in December!"
December? Um, okay. "What did you see a worker for in December?" I asked him.
"Oh, when Dad hit me in the face", he told me.
I couldn't speak for what seemed like ten minutes but was probably about ten seconds.
"Okay, what are you talking about?" I asked, trying not to freak out.
So the story unfolded: Curt had hit my son in the face and when a counsellor at the school noticed a red mark on my son's face, he called CAS. (I still feel sick when I think about this). The worker, a woman named Amy, saw my son and pretty much disregarded the fact that Curtis had hit him. IN THE FACE. She told my son that if he behaved, he wouldn't get hit. She also apparently told him that since I was an unfit mother, he would go to a foster home if he kept it up.
Well, my son is not a bad child for one thing. He has never displayed any behaviour I cannot handle or that I think is worrisome. And it gets better....
So Kelly showed up Friday morning. I asked her if it was true that Leslie had told my ex and his girlfriend to keep my son from seeing me (as this is what was said in court). She admitted it was true. She said the allegations were so serious, she had to do that.
So, CAS has cost me thousands of dollars in lawyer's fees as well as money to the government as my ex committed a fraud in regards to my Child Tax Benefit. Oh, let's not forget the stress that has made me ill and made me miss and even fail some classes.
There is no way to fight CAS. I was told by this worker that they will always be around, watching me. I have not harmed my children and my kids will tell anyone that. I invite the workers into my home and I try to be compliant. I AM A SOCIAL SERVICE WORKER MYSELF. But I have to do what they say and I am a prisoner.