I'm hurting inside

My son's father doesn't have anything to do with him anymore. He's always calling his daddy's name and I get so sad because I don't know what to tell him. I've asked him plenty of times if he was going to help me support him. He told me he didn't have money. I told him that I'll be lenient on him then but can he at least call and talk to him through video chat sometimes, he never do. The only time they talked was when I initiated and let my son call. My son had covid these past two weeks and I told his father. After I told him, he said everything was going to be okay and we haven't heard anything else from him. He haven't checked on him or asked him if he needed anything. I'm about to have another child and I asked him if he wanted to be there he just said he'll let his mom be there instead. A couple months ago I pressed charges on him for vandalism and abuse and I guess I crossed the line for him. I don't know how I'm going to make it with two children and no support. I need him to help out but I'm preparing myself to do it all alone. I don't want a relationship with him but I want my kids to have one with him. I feel broken.