If you need to re-list your property, you can do so at any point by finding your listing on your dashboard. Where you're re-advertising within 3 weeks of the property being de-listed, you just need to click on Re-Publish.
Re-listing a property that hasn't been advertised in over 3 weeks can be done by clicking Duplicate My Listing. Here's an example of how this'll look:
Upon clicking Duplicate My Listing, you can make changes to your advert before re-publishing.