Ron Stevens is Absolutely the right person to complain to. And what you should complain about is the unlawful confinement, the physical and sexual assault and so on.
You should expect a reply within a couple of months and it will likely be a form letter.
It might even say that you have a right to go to a JP and lay a private "information," which is an official complaint.
Another thing you can do is make an application under PIPA .
Since you were inmates of AARC they are obliged to provide you with all their records about you including the phony releases that you were coerced into signing.
Don't let that deter you, though, because this will surely lay the groundwork for the action that you wish to take.
Information on PIPA is available at :
http://www.oipc.ab.ca/pipa/