They treated humans like dogs

It was the around 10:50pm 11th of September 2015, when I parked my car off long street, Cape Town CBD. After locking my car I was just grabbed and kicked to the ground. I found those big boots on my neck, I saw a riot of about 15 police officers. They harassed everyone in that area. They searched me, while anAK47 was pointing on my head. They threw everything out of my car, which included my client's designer made clothing. After searching me and my car, they didn't find anything *******. Why not apologizing for beating and harassing me for nothing? Why not pick my clothes and put back in the car ? Why did they put my belongings on dirt / in water? Is this policing fair? Is it how it should be done? Is the police allowed to kick me even if I am complying? I am not happy by the way I was treated and the damage my belongings. Reporting the case to the police won't help that's why I found it better to repotting the public.