Unfortunately not all landlords reply to every message they receive. They might even only contact those they want to invite for a viewing.
If you feel you're not on the landlord's radar, you can send them another message. As a reminder and to show you're really interested.
On our side we do our best to stimulate landlords to reply to your message: whether it's positive or negative, you have the right to a reply.
Even though not getting a reply can't always be helped, there are things you can do.
What can you do to increase your chances?
Make sure your message is personal and introduce yourself and explain why you're interested in the property;
Make your profile visible to everyone, because landlords can actively look for tenants as well;
Fill out your entire profile. Of course always share what you're comfortable with, but we'd suggest that you fill out more than the bare minimum.
On a last note: lots of landlords usually start with contacting interested tenants when they've removed the listing from the website. So if you don't see the ad anymore and haven't received a reply: don't worry, there's still a good chance you get invited for a viewing.