Got married at age 19 and mentally tortured by the wife

I am Christian. Was 19 yr old at the time of marriage in 2002. The priest was my father in law who wrote 21 years on my marriage certificate. My wife had extra marital affairs. Now also.We are living under same roof but no physical contact for 5 years. I have no job. She has govt job. She convinced me to quit my job as lab technician. She wants me to be a dependent. There are times when she doesn't give food to me especially when I find a job. She abuses me in front of the kids. I suffer from depression too. She tortures me mentally. I don't get medical aid in case of injury or sickness. If I find a job and go for work, she stops giving food. I m helpless and broken. I want to save my future by getting a divorce. What is the solution to this? Pls help me. Is there a remedy or am I doomed for life? Someone told me to contact lawRato. My fundamental right of life to dignity is being violated. Please save me. I m not so good with English, so a relative of mine is typing for me.