What is your mom’s business? Could she do it at a different location or start an Internet business?
I suggest you get in touch w an online suicide help resource if their are no phone help resources in India.
Work as hard at school as you can. Education is a way out that many, many people use in the US to work their way out of bad situations —-poverty, abuse. Getting a job at the same time would help you in your long term exit strategy. Even if your dad takes the money, you would gain important job skills. Learn what you need to in school and work to help your mom start an internet business.
Help us out here, you folks from India. What would you do if this were you? Could she earn a scholarship for college?