I'm going to ignore my father's phone calls
Why do you want to ignore your dad's phone calls?
Because he always seems to want something from me.
I understand where you're coming from, and it's reasonable to ignore your dad's phone calls if he only gets in contact with you when he wants something. It's important to take care of your mental health first, before taking care of anyone else.
I'm still going to ignore his calls because I don't give a fuck.
If you think that is the healthiest thing for you, that is probably the right thing to do.