Help my dad fight CANCER

PLEASE help my dad he’s been diagnosed with a rare cancer and they can’t treat him, No they won’t treat him till he pays even though it’s life or death right now . This man is not my biological father but has been in my life for as long as I can remember he’s the best and only dad I have ever known he still has two younger sons that are only 10 and 13 they need their father i was lucky to have Steven growing up when my biological dad passed away I beg you to help us so my brothers can have their dad. Please anything will help