I guess it all depends on how you want to deal with the situation.. the recourse could be worse than the experience in my opinion. Sometimes raising a fuss, even if it is a well deserved fuss.. can create further problems.
That said, if you have the resources at your disposal to hire an attorney and seek legal counsel, I would by all means see it through.It is always helpful to report this to the Canadian embassy as they will at least offer insight as to future course of action.
I have had my own misfortune of being mistreated by Qatar Police. So while I remain sympathetic, I also know that you have to put a realistic perspective on the outcome of your action in a judicial(hardly) process that is ultimately corrupt, nepotistic,and xenophobic.
These constant sickening displays of Qatari elitism, and power tripping are so pathetic to me.. i really loathe the country and all it has come to represent. If there was one mistake i made in my dealings with police.. it was not punching out the weak excuse for a man that called himself an officer.