My grandma who adopted me always hits me in the head and slaps me hard in the face is that abuse?

My dad also tried hitting me in the stomach.Ok so here's the story:I was putting a timer on the fridge thinking it was a magnetnt it wasn't so it fell. I picked it up, he started yelling at me,then smacks my head hard and tried to punch me in the stomach.I deal with this often so I often dodge or stop his hand.I told my mom I did nothing wrong and she said "Shut up its your fault"She calls me no good a piece of shit and the "spawn of Satan" When I went back to my dad and asked why he said he was PLAYING AROUND I think this is abuse physical AND mental what do I do?!