democracy means rule by the people, representation is a method to achieve that, you cant expect 260 million people voting for every public decision every few days, representative congress was created to simplify this process. also pure democracy is mob-rule, thats why individual rights, minority rights and separation of power were brought in to prevent the deciding majority from wielding absolute power against opposition in the name of democracy.
therefore I like to call "representative" a method, not a form of government.