Harassment by a husband

Salam,

I am in need of great help, I am asking my question through my sister as I don't have access to my phone or internet.

I am born an brought up in Dubai, and I am married with three kids and stay in Sharjah now.

I am going through a lot of stress because of my husband. He threatens to hit me, he locks me up with my kids and goes to the office, he even took away my phone so I cannot contact my family, he asked me to cut off all the ties with my family members and they are also not allowed to meet me.

He has installed a camera at home to keep an eye on me, he also had an affair with an Indonesian female, he threatens to send me to Pakistan with my kids, I really don't want to go there as my whole family is here.

My family cant help me because their financial condition is not very stable. My husband wants me to leave him so that he will not have to pay any alimony for me and my help.

I have had a lot of health issues, I really need some help, I feel I will die due to depression.