Bulllied At A Consulting Office

I am a 40 years man who had been bullied throughout school and university and now bullied at the workplace. I work secretarial and administrative work in a consulting office. Engineers in the 20's (boys and girls) used to make fun of me and laugh at me saying things like "you sweety secretary". Later I was subject to being hit by one of them. He hol my shirts, pushed me and kicked me. My Mother and Big sister came who use to pick me after work then came and talked to the manager who didn't believe much. I'm now staying and working from home helping my sister which I found better.