I'm fed up of my father's irresponsible behavior. What should I do?

It's been 7 years now and my father thinks that my mother uses the monthly money for enjoyment. Eventually, he started to give us less money to run the house and my (and my two other siblings) school fees. This caused my mom to start a job. She faced many hardships. We had to stay alone at home for hours until she came back and gave us food and helped us with other stuff. Next, my dad stopped eating food with us. My brothers are very small so this affected them badly and they would question me why our dad wasn't having food with us. For 2 years straight, he didn't talk to us, didn't have food with us, didn't greet us when he came back from work, didn't come to school events, it was like we were living with a stranger under one roof. Almost every week my mom and dad would get into fights and arguments. This year I talked to my dad but not face to face. i messaged him everyday for 3 months hoping he would realize our significance but it was no use. He started giving us even less and so my mom would have to borrow money. She came under depression as she didn't know how to pay the debts and how to pay the household and school bill at the same time. Every time she would talk to my dad about the whole dilemma he'd always make a huge fuss about it. He'd hit her, lie about her, shout at us and scold us, threaten to kick her out of the house, threaten to give even less money, and even threatened to divorce my mom. But mom still tried to talk to him and he'd do the same again. Once my dad and I went for jogging and he brought up the topic of me sending him texts about the issue. I started crying but made him promise to respect us and my mom and not argue. He accepted the promise yet he still does it. My mom had started working socially as she loves to work for society. For work purposes she'd have to travel out of city. My dad thinks this is just an excuse to leave the house for some time. What should I do? I love both of my parents equally but this is destroying my and my brothers childhood. I have developed depression and anxiety. I'm always worried about my family at school which causes me to focus less on studies. I'm in my early teens (i can't reveal my real age) and I have tried to talk multiple times with my parents to stop the fuss but it's no use. I have even tried to attempt suicide 2 times but somehow, it never worked. Please suggest me what to do.