Iremmi

Hi there, this is my 3rd time downloading this game and my problem isn't solved... I can not fight, when I started to battle with a pokemon my health bar is not go down always other pokemon hit themselves, and suddenly says your Pokemon has fainted. And after that, if i try to change my battle pokemon my pokemon goes enemy side and i can't quit the fight. I don't know what to do. I can not fix it because of this problem i can not play this game because it is an annoying situation. Please, someone, help me.