Love marriage threatening

Hi, My name is Mounika. We both were in love relationship for 2 years now. We opened up this to our family but my family is not accepting for Intercaste marriage. They locked me in my room for 3 weeks last year and then they came into an agreement like, they will arrange marriage for us after March 31st 2025 but recently my mother stating that she has no interest to arrange marriage for us and i have to sign on all documents such as no money or anything will be provided by them and i should not even contact my family once I get married to my loved one. Here the main problem is, I really afraid that whether they will again make a problem and house arrest me, also threaten me that they will kill my lover. Also my family is making black magic with our photos and we were facing many issue because of that. I don't know how to overcome from this and whom to complain because my mother's friend is a politician and he knows the local rowdies and policies so, they will do something against us. Please help me on this