Worst Hotel Service EVER!!

It's a pity that I had to give one star because they deserve no stars. I attended a week long work conference at this hotel (Monday to Friday 18 -22 February 2019). On the Tuesday afternoon I had forgotten my jacket in their conference room and on the Wednesday Morning it was gone. My colleagues who also attended the training with me also left some of their items in the conference room numerous times and they found it the next day. Throughout that entire week my Jacket was the only thing to go missing. Their own staff admitted to having seen my jacket there when they were clearing up after everyone had left but it apparently just disappeared. One of the waiters had the nerve to ask me if I checked in my wardrobe to which I responded that I would not be looking for it there if I had taken it home and also all of my colleagues were witnesses to the jacket being there after I had left. I told the "management" that my jacket was sentimental because I got it from my mother and they assured me that they would reimburse me for it if they could not find it and even asked where it was purchased, what it looked like and how much it cost. When I requested to see their surveillance videos they refused and stated that only they are allowed to view them, I strongly doubt that they even did. They did not provide me with any feedback unless I approached them and even then they'd say they're still investigating. Once the conference was over they promised to get back to me and let me know how they'd rectify the situation but no one ever got back to me and when I called them they would answer at first and tell me that they are still investigating. After a while however they began to ignore my calls - the Food & Beverage Manager Amukelani Makhubela who I had spoken to and who told me he would call me back, never did. I even called their reception and left messages but still no one got back to me. I am really disappointed in this terrible service especially because they made it seem as though they would really make an effort to fix it. I really hope that someone will have the decency to get back to me after this complaint because I am not letting this go!!