Democracy means that decisions are made publicly.
In a representative democracy that is truly democratic, we would know where decisions are made. We would see not merely the [procedural and policy] results of party/company-internal decisions – we would be able to see the decisions themselves.
Indeed those discussions and decisions would be the most interesting thing to watch. In contrast, [really existing ]parliamentary discussion and procedure is boring to watch – precisely because it isn’t the actual decision making process.
Whether such transparency is possible in a representative system is an open question. And so also: whether a representative system could even potentially be a democracy is an open question.