How to Get the Most Out of a Demo Request

When someone comes in and asks for a demo to pass them to a sales development rout that's usually entry level. And then what happens after that meeting? They send us seven emals, we never answer, and the next day we are already on your competitor's platform. I think it just so misalined with what the buyer asks for. i know for certain that companies have lost deals with me as a buyer that have been where between 12 and 50 thousand dollar year softore deals they've lost by submitting a demo request.