Help on...elderly annoyances!!!

Ok. My grand dad is a jerk he is like always messing wit me… For example today I got off early from school(high school) and for one he forgot me and I had to wait 45 minutes… And I was not madd about it I let it slide… And so I get in the car and I asked my grandma could she get me something to eat and we went to wendy’s and we got done there and started heading to their house… And he was playin this annoying harmonica and I asked him could he pleeese stop I got a headache from that thing an he was like no stop being disrespectful and since you said something im gonna keep going… And I wasnt sayin anything else because of my head. And he kept going on about how I was disrepectful and stuupid stuff like that… And I started cryin because when I get like really madd I cry… And I was sittin there and he was like you are so diresectful. And I told him that no you are wrong for callin me disreapectful and I did say anything but ‘’may you pleeese stop playin the harmanica because I have a headache’’ and he started yellin more about knowin my place and I told him that if he wants respect he has got to give it too. And I told him that its had bein in the place im in because whenever I try to stand up for myself I get called disrespectful an you dont get called nothing but rite and he knew that he was wrong for doin that… And I basically hate him rite now… And im thinkin about not talkin to him ever again… Im tired of being scolded for nothing I have done. So yea. May you pleeese help me out because I dont know what to do its really frustrating just sittin there gettin yelled at… Sooo pleeese help…!!!11