BKB Kroonstad Retail store- WORST BOSS EVER!!!

Today I've worked at this company now for 11 months. It has been the worst experience of my life. My boss has criticized me on my disability (being deaf in both ears) even though I wear hearing aids. He would say "you can't hear, you can't help the clients, so what can you do?!" He said this to me 2 times. He has treated me very unfairly by humiliating me on false accusations. A new cashier started a month ago and he kept on favouring her infront of me. Today I resigned and gave my resignstion letter to him. Later today he called me jnto his office and told me I should go, that I would just be in his way. I walked to my office and he came with and just stood there. I got my handbag and said thank you for everuthing then, he just slightly nodded and left. Everything I did for this company- was for nothing. I fell into severe deoression and anxiety especially around him. The other staff members would gossip to him things about me that was inaccurate- like how I refused to work over time. The reason for this is is because the company refuses to pay me for over time. And again, I was called into the office and yelled at. He said to me this morning, the new girl is starting Monday in my place and going on training (I never received training). He would not greet or talk to me, ever, but would talk for hours with the others. He had a secret relationship with one of the cashiers even though he is married and have kids. He would talk to me constantly in a downgrading way and belittled me so much sometimes infront of clients. Stock is being ****** in the warehouse area where the livestock feed is, and he would do nothing about it. In the morning, he humiliated me again in false accusations about petty cash not adding up. It's not my responsibility. I hated working for this company and under him. I've worked really hard, and I was overloaded with work. In such way that some tasks were falling behind. I tried to talk to him about it, but he ignored me. This is BKB Retail Store in Kroonstad.