Very angry

Last year in October to December I worked at Capability bpo as a customer service agent under Nishan the team leader. The treatment I received from the team leader Nishan I don't even wish for my worse enemy. Everyday when I go to work I use to cry and pray what I'm going to face today from him. He use to shout at me in front of everyone calling me stupid. U can ask anyone from his team they will tell you that they want to change the team and how he treats people. Even other teams will tell you about Nishan. I thought that I found a job but I lied to myself and that why I resigned. When I sent my resignation letter to HR he ask me is because of him that I resigned. I didnt answer him. Last and foremost the company were debiting money in my salary for the headset, UB key and the access disk but when I bought them back they didn't give me my money back has they promise. I didnt even get my commission but what can I say I learned my listen from Capability.