My cat has been cut with a knife

Hello everyone, I have a cat that I adopted two years ago, his name is coco. Last night somebody cut his head with a knife, fortunately thank God he is still alive however his ears are almost cut off, skin on his head is flinging. I cannot imagine the pain he's feeling right now. If you find it in your heart to help me and my cat we'll be eternally grateful to you. God bless you all.