I'm really not surprised to see CAE behaving this way, again!
It was a nightmare when I was there 6 months ago, and by the comments I'm hearing from friends in Oxford and Phoenix things are even worst now.
It's not the first time people are having problems with the finance department, in my opinion you should get a lawyer to deal with these people.
My best advice to you all is to stay away from them, it is not what it used to be anymore.